Problems
Previous and next letter
Previous and next letter
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