shit.rb

#!/usr/bin/ruby


DATA = File.read('data.txt').strip

copy = [DATA.clone, true]

# $counts = {}

def make_pass input
    input += "?"
    n = 0
    ret = ""
    while n < input.size-1
        e1 = input[n]
        e2 = input[n+1]
        if e1.upcase == e2.upcase and e1 != e2
            # $counts[e1.downcase] = $counts.fetch(e1.downcase, 0) + 1
            n += 1
        else
            ret += e1
        end
        n += 1
    end

    # p input
    # p ret
    # p [ret.size, input.size]
    [ret, ret.size != input.size-1]
end

# loop do
    # copy = make_pass copy.first
    # break unless copy.last
# end

# p copy.first.size
p2 = ('a'..'z').map do |c|
    copy = [DATA.gsub(/[#{c}#{c.upcase}]/, ''), true]
    loop do
        copy = make_pass copy.first
        break unless copy.last
    end
    p [c, copy.first.size]
    [c, copy.first.size]
end.to_a.sort_by{|k, v| v}
p p2