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 static System.Console;
using static System.Math;

public class Hello{
    public static void Main(){
        /*
        int reader = int.Parse(ReadLine());
        long[] ryuka = new long[reader+1];
        ryuka[0] = 2;
        ryuka[1] = 1;
        for(int i=2;i<=reader;i++){
            ryuka[i] = ryuka[i-1]+ryuka[i-2];
        }
        WriteLine(ryuka[reader]);*/
        string reader = ReadLine();
        string a = "abcdefghijklmnopqrstuvwxyz";
        int k = a.IndexOf(reader);
        WriteLine(a[k+1]);
    }
}