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part1 = 'abcdefghijklm '
part2 = 'nopqrstuvwxyz.'
convert = (text) ->
output = ""
for i in [0...text.length]
index = part1.indexOf text.charAt(i)
if index isnt -1 then output += part2.charAt index else
index = part2.indexOf(text.charAt(i))
output += part1.charAt index
output
console.log convert("hi how are you")
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