JS in five chars []+=`

5-char-js.txt

(x)        => [x][+[]]
false      => []==[]
true       => +[]==[]
undefined  => [][[]]
NaN        => +[][[]]
0          => +[]
1          => ++[[]][+[]]
2          => ++[+[]==[]][+[]]
3          => ++[++[+[]==[]][+[]]][+[]]
4          => ++[++[++[+[]==[]][+[]]][+[]]][+[]]
5          => ++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]
6          => ++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]
7          => ++[++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]
8          => ++[++[++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]
9          => ++[++[++[++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]
"10"       => ++[[]][+[]]+[+[]]
"11"       => ++[[]][+[]]+[++[[]][+[]]]
"21"       => ++[+[]==[]][+[]]+[++[[]][+[]]]
etc. Strings like these work as indices, e.g. string[++[[]][+[]]+[+[]]] returns the 10th char in string
Infinity   => +[++[[]][+[]]+[[][[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[++[[]][+[]]]+[+[]]+[+[]]+[+[]]]

"f"        => [[[]==[]]+[]][+[]][+[]]
"a"        => [[[]==[]]+[]][+[]][++[[]][+[]]]
"l"        => [[[]==[]]+[]][+[]][++[+[]==[]][+[]]]
"s"        => [[[]==[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]
"t"        => [[+[]==[]]+[]][+[]][+[]]
"r"        => [[+[]==[]]+[]][+[]][++[[]][+[]]]
"u"        => [[][[]]+[]][+[]][+[]]
"n"        => [[][[]]+[]][+[]][++[[]][+[]]]
"d"        => [[][[]]+[]][+[]][++[+[]==[]][+[]]]
"e"        => [[][[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]
"i"        => [[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]
"fill"     => [[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]
"find"     => [[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]
[]["find"] => [][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]]

[]["find"]+[] in Firefox gives us:
function find() {
    [native code]
}
In Chrome it gives us:
function find() { [native code] }

[]["find"]+[] => [[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]]
"c"           => [[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]
"o"           => [[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]

"constructor" => [[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[[]==[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]
Function      => [][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]][[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[[]==[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]]


~~~~~~~~ Property names ~~~~~~~~

""               => []
"0"              => +[]
"undefined"      => [][[]]
"false"          => []==[]
"NaN"            => +[][[]]
"true"           => +[]==[]
"00"             => +[]+[+[]]
"1"              => ++[[]][+[]]
"0false"         => +[]+[[]==[]]
"undefined0"     => [][[]]+[+[]]
"0undefined"     => [+[]]+[][[]]
"0true"          => +[]+[+[]==[]]
"0NaN"           => +[]+[+[][[]]]
"NaN0"           => +[][[]]+[+[]]
"false0"         => [[]==[]]+[+[]]
"000"            => +[]+[+[]]+[+[]]
"true0"          => [+[]==[]]+[+[]]
"undefinedfalse" => [][[]]+[[]==[]]
"falseundefined" => [[]==[]]+[][[]]
"undefinedtrue"  => [][[]]+[+[]==[]]
"trueundefined"  => [+[]==[]]+[][[]]
"NaNfalse"       => +[][[]]+[[]==[]]
"00undefined"    => +[]+[+[]]+[][[]]
"0undefined0"    => +[]+[][[]]+[+[]]
"undefined"*2    => [][[]]+[]+[][[]]
"undefinedNaN"   => [][[]]+[+[][[]]]
"NaNundefined"   => +[][[]]+[]+[][[]]
"NaNtrue"        => +[][[]]+[+[]==[]]
"01"             => +[]+[++[[]][+[]]]
"10"             => ++[[]][+[]]+[+[]]
"falsefalse"     => [[]==[]]+[[]==[]]
"NaNNaN"         => +[][[]]+[+[][[]]]
"undefined00"    => [][[]]+[+[]]+[+[]]
"falsetrue"      => [[]==[]]+[+[]==[]]
"truefalse"      => [+[]==[]]+[[]==[]]
"falseNaN"       => [[]==[]]+[+[][[]]]
"trueNaN"        => [+[]==[]]+[+[][[]]]
"truetrue"       => [+[]==[]]+[+[]==[]]
"undefined1"     => [][[]]+[++[[]][+[]]]
"1undefined"     => [++[[]][+[]]]+[][[]]

"u"              => [[][[]]+[]][+[]][+[]]
"N"              => [+[][[]]+[]][+[]][+[]]
"f"              => [[[]==[]]+[]][+[]][+[]]
"t"              => [[+[]==[]]+[]][+[]][+[]]
"n"              => [[][[]]+[]][+[]][++[[]][+[]]]
"a"              => [[[]==[]]+[]][+[]][++[[]][+[]]]
"r"              => [[+[]==[]]+[]][+[]][++[[]][+[]]]
"d"              => [[][[]]+[]][+[]][++[+[]==[]][+[]]]
"l"              => [[[]==[]]+[]][+[]][++[+[]==[]][+[]]]


~~~~~~~~ Charset ~~~~~~~~

Chars that require backticks to create: ",/<=>O\bjw
These chars can be stored in a property if it's necessary to use them in a function.
Firefox-only chars: newline, backslash, w
Chars differing between Firefox and Chrome: []v}

ASCII charset:
"\n" => (Firefox) [[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[[]][+[]]+[++[++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]]]
" "  => [[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[[]][+[]]+[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]]
"!"  => ???
"""  => [[]+[]][+[]][[[[]==[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]]``[++[[]][+[]]+[++[+[]==[]][+[]]]]
"#"  => ???
"$"  => ???
"%"  => ???
"&"  => ???
"'"  => ???
"("  => [[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[[]][+[]]+[++[++[+[]==[]][+[]]][+[]]]]
")"  => [[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[[]][+[]]+[++[++[++[+[]==[]][+[]]][+[]]][+[]]]]
"*"  => ???
"+"  => `+` or [+[++[[]][+[]]+[[][[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[++[[]][+[]]]+[+[]]+[+[]]]+[]][+[]][++[+[]==[]][+[]]]
","  => [[[]][[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[[]][+[]]]+[[+[]==[]]+[]][+[]][+[]]]``+[]][+[]]
"-"  => [+[[+[++[[]][+[]]+[++[[]][+[]]]+[[][[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[++[[]][+[]]]+[+[]]+[+[]]]+[]][+[]][++[[]][+[]]]+[+[]]+[+[]]+[+[]]+[+[]]+[+[]]+[+[]]+[++[[]][+[]]]]+[]][+[]][++[+[]==[]][+[]]]
"."  => [+[++[[]][+[]]+[++[[]][+[]]]+[[][[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[++[[]][+[]]]+[+[]]+[+[]]]+[]][+[]][++[[]][+[]]]
"/"  => [[]+[]][+[]][[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[[]==[]]+[]][+[]][++[[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]]``[++[++[++[+[]==[]][+[]]][+[]]][+[]]]
"0"  => +[]+[]
"1"  => ++[[]][+[]]+[]
"2"  => ++[+[]==[]][+[]]+[]
"3"  => ++[++[+[]==[]][+[]]][+[]]+[]
"4"  => ++[++[++[+[]==[]][+[]]][+[]]][+[]]+[]
"5"  => ++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]+[]
"6"  => ++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]+[]
"7"  => ++[++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]+[]
"8"  => ++[++[++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]+[]
"9"  => ++[++[++[++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]+[]
":"  => ???
";"  => ???
"<"  => [[]+[]][+[]][[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[[]==[]]+[]][+[]][++[[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]]``[+[]]
"="  => `=` or [[]+[]][+[]][[[[]==[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]]``[++[[]][+[]]+[++[[]][+[]]]]
">"  => [[]+[]][+[]][[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[[]==[]]+[]][+[]][++[[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]]``[++[+[]==[]][+[]]]
"?"  => ???
"@"  => ???
"A"  => [[][[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[[]==[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]]+[]][+[]][++[++[++[++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]]
"B"  => [[[]==[]][+[]][[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[[]==[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]]+[]][+[]][++[++[++[++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]]
"C"  => ???
"D"  => ???
"E"  => ???
"F"  => [[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]][[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[[]==[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]]+[]][+[]][++[++[++[++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]]
"G"  => ???
"H"  => ???
"I"  => [+[++[[]][+[]]+[[][[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[++[[]][+[]]]+[+[]]+[+[]]+[+[]]]+[]][+[]][+[]]
"J"  => ???
"K"  => ???
"L"  => ???
"M"  => ???
"N"  => [+[][[]]+[]][+[]][+[]]
"O"  => [[][[[][[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]]``[[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[[]==[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]]+[]][+[]][++[++[++[++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]]
"P"  => ???
"Q"  => ???
"R"  => ???
"S"  => [[[]+[]][+[]][[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[[]==[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]]+[]][+[]][++[++[++[++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]]
"T"  => ???
"U"  => ???
"V"  => ???
"W"  => ???
"X"  => ???
"Y"  => ???
"Z"  => ???
"["  => `[` or
        (Firefox) [[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[+[]==[]][+[]]+[++[+[]==[]][+[]]]]
        (Chrome)  [[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[[]][+[]]+[++[++[++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]]]
"\"  => (Firefox) [[]+[]][+[]][[[[]==[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]]``[[[+[]==[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[[]+[]][+[]][[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[[]==[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]]+[]][+[]][++[++[++[++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][+[]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[][[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]]``[++[+[]==[]][+[]]+[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]]
"]"  => `]` or
        (Firefox) [[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]+[++[++[++[+[]==[]][+[]]][+[]]][+[]]]]
        (Chrome)  [[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]+[+[]]]
"^"  => ???
"_"  => ???
"`"  => ???
"a"  => [[[]==[]]+[]][+[]][++[[]][+[]]]
"b"  => [[][[[][[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]]``+[]][+[]][++[+[]==[]][+[]]]
"c"  => [[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]
"d"  => [[][[]]+[]][+[]][++[+[]==[]][+[]]]
"e"  => [[][[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]
"f"  => [[[]==[]]+[]][+[]][+[]]
"g"  => [[[]+[]][+[]][[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[[]==[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]]+[]][+[]][++[[]][+[]]+[++[++[++[+[]==[]][+[]]][+[]]][+[]]]]
"h"  => ???
"i"  => [[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]
"j"  => [[][[[][[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]]``+[]][+[]][++[++[+[]==[]][+[]]][+[]]]
"k"  => ???
"l"  => [[[]==[]]+[]][+[]][++[+[]==[]][+[]]]
"m"  => [[+[]][+[]][[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[[]==[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]]+[]][+[]][++[[]][+[]]+[++[[]][+[]]]]
"n"  => [[][[]]+[]][+[]][++[[]][+[]]]
"o"  => [[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]
"p"  => ???
"q"  => ???
"r"  => [[+[]==[]]+[]][+[]][++[[]][+[]]]
"s"  => [[[]==[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]
"t"  => [[+[]==[]]+[]][+[]][+[]]
"u"  => [[][[]]+[]][+[]][+[]]
"v"  => (Firefox) [[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[+[]==[]][+[]]+[++[++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]]]
        (Chrome)  [[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[+[]==[]][+[]]+[++[++[+[]==[]][+[]]][+[]]]]
"w"  => (Firefox) [+[]][+[]][[[+[]==[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[[]+[]][+[]][[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[[]==[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]]+[]][+[]][++[++[++[++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][+[]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[][[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]]``[++[++[+[]==[]][+[]]][+[]]]
"x"  => ???
"y"  => [+[++[[]][+[]]+[[][[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[++[[]][+[]]]+[+[]]+[+[]]+[+[]]]+[]][+[]][++[++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]]
"z"  => ???
"{"  => [[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[[]][+[]]+[++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]]
"|"  => ???
"}"  => (Firefox) [[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]+[++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]]
     => (Chrome)  [[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]+[++[+[]==[]][+[]]]]
"~"  => ???

How to find each char:
"\n" => []["find"]+[]
" "  => []["find"]+[]
"!"  => ???
"""  => ""["fontcolor"]
"#"  => ???
"$"  => ???
"%"  => ???
"&"  => ???
"'"  => ???
"("  => []["find"]+[]
")"  => []["find"]+[]
"*"  => ???
"+"  => +"1e1000"+[]
","  => []["concat"]``
"-"  => +".0000001"+[]
"."  => +"11e100"+[]
"/"  => ""["italics"]``
"0"  => 0+[]
"1"  => 1+[]
"2"  => 2+[]
"3"  => 3+[]
"4"  => 4+[]
"5"  => 5+[]
"6"  => 6+[]
"7"  => 7+[]
"8"  => 8+[]
"9"  => 9+[]
":"  => ???
";"  => ???
"<"  => ""["italics"]``
"="  => ""["fontcolor"]``
">"  => ""["italics"]``
"?"  => ???
"@"  => ???
"A"  => []["constructor"]+[]
"B"  => true["constructor"]+[]
"C"  => ???
"D"  => ???
"E"  => ???
"F"  => []["find"]["constructor"]+[]
"G"  => ???
"H"  => ???
"I"  => +"1e1000"+[]
"J"  => ???
"K"  => ???
"L"  => ???
"M"  => ???
"N"  => +undefined+[]
"O"  => []["entries"]``["constructor"]+[]
"P"  => ???
"Q"  => ???
"R"  => ???
"S"  => ""["constructor"]+[]
"T"  => ???
"U"  => ???
"V"  => ???
"W"  => ???
"X"  => ???
"Y"  => ???
"Z"  => ???
"["  => []["find"]+[]
"\"  => ""["fontcolor"]``["toSource"]``
"]"  => []["find"]+[]
"^"  => ???
"_"  => ???
"`"  => ???
"a"  => false+[]
"b"  => []["entries"]``+[]
"c"  => []["fill"]+[]
"d"  => undefined+[]
"e"  => undefined+[]
"f"  => undefined+[]
"g"  => ""["constructor"]+[]
"h"  => ???
"i"  => undefined+[]
"j"  => []["entries"]``+[]
"k"  => ???
"l"  => false+[]
"m"  => 0["constructor"]+[]
"n"  => undefined+[]
"o"  => []["find"]+[]
"p"  => ???
"q"  => ???
"r"  => true+[]
"s"  => false+[]
"t"  => true+[]
"u"  => undefined+[]
"v"  => []["find"]+[]
"w"  => 0["toSource"]``
"x"  => ???
"y"  => +"1e1000"+[]
"z"  => ???
"{"  => []["find"]+[]
"|"  => ???
"}"  => []["find"]+[]
"~"  => ???

Variables

To get "variable" X, use this:

[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]][X]

You'll probably want to set it first, by using the above code and adding =whatever. X can be any valid value, including [] (which is equivalent to the empty string). A list of unique values can be found at line 52.

Functions

Here's the boilerplate for a function:

[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]][[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[[]==[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]]`code_here`

Insert code at the end, obviously using only []+=.

Recursion

To do recursion, create a variable, manually overwrite its toString function, and in that function, stringify the variable with +[].

X=[];
[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]][X]=[];
[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]][X][
  [[+[]==[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[[]+[]][+[]][[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[[]==[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]]+[]][+[]][++[++[++[++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[[]+[]][+[]][[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[[]==[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]]+[]][+[]][++[[]][+[]]+[++[++[++[+[]==[]][+[]]][+[]]][+[]]]]
]=[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]][[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[[]==[]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[+[]==[]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][+[]]+[[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]+[[[]==[]]+[]][+[]][++[+[]==[]][+[]]]]+[]][+[]][++[++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]][+[]]]+[[+[]==[]]+[]][+[]][++[[]][+[]]]]
  `[]+[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]][X]`;
[]+[][[[[]==[]]+[]][+[]][+[]]+[[][[]]+[]][+[]][++[++[++[++[+[]==[]][+[]]][+[]]][+[]]][+[]]]+[[][[]]+[]][+[]][++[[]][+[]]]+[[][[]]+[]][+[]][++[+[]==[]][+[]]]][X]

The above code is equivalent to

X=[];
[].find[X]=[];
[].find[X][
  "toString"
]=Function
  ('[]+[].find[X]');
[]+[].find[X]

and causes a "too much recursion" error when run.