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 (3.4.3) (judge verdict: Accepted)

C = input()

def next_to(alphabet):
    alphabets = 'abcdefghijkllmopqrstuvwxyz'
    index_of_alphabet = alphabets.find(alphabet)
    next_to= alphabets[index_of_alphabet + 1]

    return next_to

answer = next_to(C)

print(answer)