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)

N, M = map(int, input().split())

A = [[0] * 2 for i in range(M)]

for i in range(M):
    A[i][0], A[i][1] = input().split()


AC = [0] * M
WA = [0] * M

for j in range(M)[::-1]:
    if A[j][1] == 'AC' and (A[j][0] in AC) is False:
        AC[j] = A[j][0]
    elif A[j][1] == 'WA' and (A[j][0] in AC) is True:
        WA[j] = A[j][0]

print(len(AC) - AC.count(0), len(WA) - WA.count(0))