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 ABC151
{
    class Program
    {
        static void Main(string[] args)
        {
            a();
        }

        public static void a()
        {
            string a = "abcdefghijklmnopqrstuvwxyz";
            string b = Console.ReadLine();
            char c = b[0];
            int d = a.IndexOf(c);
            Console.WriteLine(a[d + 1]);
        }
    }
}