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 C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp26 {
    class Program {
        static void Main(string[] args) {
            //int N = int.Parse(Console.ReadLine());

            //var x = Console.ReadLine().Split(' ').Select(x => int.Parse(x)).ToArray();

            string C = Console.ReadLine();

            string[] letter = new string[26] { "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"};

            int num = Array.IndexOf(letter, C);



            Console.WriteLine(letter[num + 1]);


        }
    }
}