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.Linq;
using System.Collections;
using System.Collections.Generic;

public class AchievetheGoal
{
   static void Main(string[] args) 
   {
     var b = Console.ReadLine().Split(' ');
     int N = int.Parse(b[0]);
     int K = int.Parse(b[1]);
     int M = int.Parse(b[2]);
     int[] A = new int[N];
	
     b = Console.ReadLine().Split(' ');
     for(int i=0;i<N-1;i++)
     {
       A[i] =  int.Parse(b[i]);
     }
     
     int G=-1;
     for(int i=0;i<=K;i++)
     {
     	A[N-1] = i;
        double Ave = A.Average();
       if(M <= Ave){G=i;break;}
     }     
     Console.WriteLine(G);
   }  
}