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: Runtime Error)

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

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            string Input;
            int N, M;
            int ac = 0;
            int wa = 0;

            Input = Console.ReadLine();
            N = int.Parse(Input.Split(' ')[0]);
            M = int.Parse(Input.Split(' ')[1]);

            int[] ac_flag = new int[100000];
            for(int i = 0; i < N; i++)
            {
                ac_flag[i] = 0;
            }

            for (int i = 0; i < M; i++)
            {
                int No;
                string S;
                Input = Console.ReadLine();
                No = int.Parse(Input.Split(' ')[0]);
                S = Input.Split(' ')[1];

                if(S == "AC")
                {
                    if(ac_flag[No - 1] == 0)
                    {
                        ac_flag[No - 1] = 1;
                        ac++;
                    }
                }

                if(S == "WA")
                {
                    if(ac_flag[No - 1] == 0)
                    {
                        wa++;
                    }
                }
            }
            Console.WriteLine("{0} {1}", ac, wa);
        }
    }
}