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liaden/rot13

Created June 23, 2014 19:57
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rot13
letters = "ABCDEFGHIJKLMNOPRSTUVWXYZ"
map = {}
letters.each_char.each_with_index do |c, i|
map[c] = letters[(i+13)%26]
end
map.keys.each do |k|
map[k.downcase] = map[k].downcase
end
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