Problems
Previous and next letter
Previous and next letter
A letter of English alphabet is given. Print its previous and next letter.
Input
One letter с ('A' < c < 'Z' or 'a' < c < 'z') of English alphabet (lowercase or uppercase).
Output
Print the letter before c and then letter after c in English alphabet (lowercase or uppercase correspondingly).
Input example #1
D
Output example #1
C E
Input example #2
x
Output example #2
w y