using System;

using System.Collections.Generic;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        for (int i = 0; i <= 25; i++)

            Console.Write(Convert.ToChar(65 + i).ToString());

        Console.WriteLine();

        for (int i = 0; i <= 25; i++)

            Console.Write((char)('A' + i));

        Console.WriteLine();

        for (int i = 0; i <= 25; i++)

            Console.Write((char)('a' + i));

    }

}