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()
s = "abcdefghijklmnopqrstuvwxyz"
flg = True
for i in range(len(s) + 1):
    if c == s[i] and c != "z":
        print(s[i + 1])
        break
    elif c == "z":
        print("a")
        break