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