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;

namespace AtCoder
{
    class Program
    {
        static void Main(string[] args)
        {
            //[summary]A - Next Alphabet
            var s = Console.ReadLine();
            var C = s[0];
            char before = 'a';

            for(char c = 'b'; c <= 'z'; c++)
            {
                if (before == C)
                {
                    Console.WriteLine(c);
                    return;
                }
                else
                {
                    before = c;
                }
            }
        }
    }
}