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 JavaScript (node.js v5.12) (judge verdict: Runtime Error)

a = input()
alpha = ["a", "b", "c", "d", "e", "f", "g",
         "h", "i", "j", "k", "l", "m", "n",
          "o", "p", "q", "r", "s", "t", "u",
        "v", "w", "x", "y", "z"]

for i in alpha:
    if a == alpha:
        print(alpha[i+1])
        break