ProgramID- 9219
SkillRack
Previous and Next - Alphabets

The program must accept a lower case alphabet CH as the input. The program must print the previous alphabet and the next alphabet of CH as the output.
Note:
For the alphabet a, consider the previous alphabet as z.
For the alphabet z, consider the next alphabet as a.

Example Input/Output 1:
Input:
c

Output:
bd

Example Input/Output 2:
Input:
z

Output:
ya


Max Execution Time Limit: 1000 millisecs