Decrypt the Encrypted Message

In intelligence communication, to avoid interception, information is often encrypted. A simple encryption method is provided: for a given string, all letters from $\texttt{a}\sim\texttt{y}$ and $\texttt{A}\sim\texttt{Y}$ are replaced by their following letter, while $\texttt{z}$ and $\texttt{Z}$ are replaced by $\texttt{a}$ and $\texttt{A}$ respectively. Other non-letter characters remain unchanged.

Note: The input provided is an encrypted string. Your task is to decrypt it to obtain the original message.

inputFormat

The input consists of a single line containing the encrypted string. This string may include letters and other characters.

outputFormat

Print the decrypted original message according to the decryption rule.

sample

b

a