Shift Alphabet

Given a string consisting of alphabetic characters, your task is to shift each character to the next one in the English alphabet. For any letter ( c ) (except the last letters in the sequence), the result should be ( c+1 ). In case the letter is 'z' or 'Z', it wraps around to 'a' or 'A' respectively.

For example, the string "abc" becomes "bcd", and "XYZ" becomes "YZA". This operation can be mathematically represented as:
[ \text{shift}(c) = \begin{cases} c+1 & \text{if } c \neq 'z' \text{ and } c \neq 'Z' \ 'a' & \text{if } c = 'z' \ 'A' & \text{if } c = 'Z' \end{cases} ]

inputFormat

The input consists of a single line containing a string s made up of alphabetic characters only.

outputFormat

Output the resulting string after shifting each character by one position. Remember, if a letter exceeds 'z' or 'Z', it should wrap around to 'a' or 'A'.

abc

bcd