Write the shortest ROT13 encoder/decoder. It should read stdin and write the ROT13'd text to stdout. Only rotate a-z and A-Z, leave everything else unchanged. Reply with your solution in any language. Shortest wins!
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Day -158: ROT13 [easy]
Write the shortest ROT13 encoder/decoder. It should read stdin and write the ROT13'd text to stdout. Only rotate a-z and A-Z, leave everything else unchanged. Reply with your solution in any language. Shortest wins!