jt.rb

words = ["B$u$i$ld", "$t$$h$e", "N$e$x$t", "E$$ra", "$$o$f$", "S$$of$t$wa$r$e", "De$$ve$l$op$me$n$t"]
i = words.size - 1
result = ''

while i >= 0
  s = i == 0 ? '' : ' '
  word = words[i]
  result = result + word.gsub('$', '').upcase + s

  i = i-1
end

puts result