using System;

public class Program

{

    public static void Main()

    {

        pyramid(10);

    }

    static void pyramid(int n)

    {

        for(int i = 1; 1<=n; i++)

        {

            for(int j = i; j<=n; j++)

            {

                Console.Write(" ");

            }

            for(int k = 1; k <= 2 * i - 1; k++)

            {

                Console.Write("A" + "");

            }

        Console.WriteLine();

        }

    }       

}