ROT13 as in "rotate by 13" is a really simple cipher algorithm, that just advances every letter by 13 places, wrapping around from Z to A. Since applying the algorithm twice would advance each letter by 26 places, it has a really neat property that encryption and decryption are the same function.
The input file DATA1.txt will contain 5 lines, strings 1 <= N <= 250 characters long.
The output file OUT1.txt will contain 5 lines -- corresponding strings that were run through ROT13 function once.
Note: The character rotation should apply only to alphabetic characters. Spaces, digits, and punctuation should stay as is.
EBG13 FNZCYR. ROT13 SAMPLE.
ROT13 SAMPLE. EBG13 FNZCYR.