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Problems

Previous and next letter

Previous and next letter

Time limit 1 second
Memory limit 128 MiB

A letter of the English alphabet is given. Print its previous and next letter.

Input data

One letter с~('A' < c < 'Z' or 'a' < c < 'z') of the English alphabet (lowercase or uppercase).

Output data

Print the letter before c, followed by the letter after c in the English alphabet (lowercase or uppercase, respectively).

Examples

Input example #1
D
Output example #1
C E
Input example #2
x
Output example #2
w y