Problem:
Score : 100 points

Problem Statement

Given is a lowercase English letter C that is not z. Print the letter that follows C in alphabetical order.

Constraints

C is a lowercase English letter that is not z.

Input

Input is given from Standard Input in the following format:

C

Output

Print the letter that follows C in alphabetical order.

Sample Input 1

a

Sample Output 1

b

a is followed by b.

Sample Input 2

y

Sample Output 2

z

y is followed by z.

Solution in Python (3.8.2) (judge verdict: Accepted)

import sys
import string

C = input()

if C == 'z' : sys.exit()

pos = string.ascii_lowercase.index(C)+1
print(string.ascii_lowercase[pos])