ROT13

Difficulty: 800 2000 ms 128 MB

strings

Apply ROT13 to the lowercase string: rotate every letter 13 places (a↔n, b↔o, ...).

Input: one line with a lowercase string.

Output: the ROT13 transformation.

Constraints:

• 1 ≤ |S| ≤ 10⁴

Sample Tests

hello

uryyb

uryyb

hello

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