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.Linq;
using System.Threading.Tasks;
using static System.Console;
using static System.Math;
class program{
  
  static void Main(string[] args){
    program p = new program();
    p.Sta();
  }
  void Sta(){
    WriteLine(Run());
  }
  
  string Run(){
	string c =ReadLine();
    string s = "abcdefghijklmnopqrstuvwxyz";
    int n = s.IndexOf(c);
    return s.Substring(n+1,1);
  }

}