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: Wrong Answer)

function main(input) {
    const alphabets = 'abcdefghijklmnopqrstuvwxyz'.split('');
  	console.log(alphabets[alphabets.indexOf(input)+1])
}
 
main(require('fs').readFileSync('/dev/stdin', 'utf8'));