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 NextAlphabet
{
    class Program
    {

        static void Main(string[] args)
        {
            var input = Char.Parse(Console.ReadLine());

            char[] alphabet = { 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'w', 'x', 'y', 'z' };

            List<char> lettersList = new List<char>();

            for(int i = 0; i < alphabet.Count(); i++)
            {
                lettersList.Add(alphabet[i]);
            }

            var output = lettersList.FindIndex(x => x == input);

            Console.WriteLine(alphabet[output+1]);
        }
    }
}