Description

Encryption was first used in ancient warfare. During the Roman Empire, Caesar used a cipher to transmit messages. It was a substitution cipher where each letter in the message was replaced by the letter $i$ positions after it. Write a program to encrypt an input English text and output the result. Only letters are encrypted, and the encryption rule is to replace each letter with the next letter in the alphabet, i.e., 'a' is replaced by 'b', 'b' by 'c', ..., and 'z' by 'a'.

Input Format

One line of string.

Output Format

The encrypted string.

Sample

Nike is excellent!

Ojlf jt fydfmmfou!