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)

function main(input) {

    var c = input[0]
    
    //文字コードに変換して+1する
    var code = c.charCodeAt(0)
    code++
    console.log(String.fromCharCode(code))
}
main(require('fs').readFileSync('/dev/stdin', 'utf8'));