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: Accepted)

"use strict";
// import bigInt from 'big-integer'

const Main = input => {
  input = input.trim()
  const a = 'abcdefghijklmnopqrstuvwxyz'
  const i = a.indexOf(input) + 1

  console.log(a[i]);
};

Main(require("fs").readFileSync("/dev/stdin", "utf8"));