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: Runtime Error)

c = input()
abc = 'abcdefghijklmnopqrstuvwxyz'

for i in range(len(str(abc))):
    if abc[i] = c:
        print(abc[i+1])