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 PyPy3 (2.4.0) (judge verdict: Accepted)

def main():
    c = input()
    abc = "abcdefghijklmnopqrstuvwxyz"
    idx = abc.index(c)
    print(abc[idx+1])

if __name__ == '__main__':
    main()