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;//リストの使用
using System.Collections.Generic;
using System.Text;//テキストの高速出力に必要
class Program
{
	static void Main()
	{
		string alphabets = "abcdefghijklmnopqrstuvwxyz";//26文字
		string s = Console.ReadLine();
    char[] c = s.ToCharArray();
    char answer = 'a';

    for(int i = 0; i < 25; i++)
    {
      if(c[0] == alphabets[i]) answer = alphabets[i+1];
    }

		Console.WriteLine(answer);
	}
}