using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("    "+"X"+" ");

        Console.WriteLine("   X"+"X"+"X");

        Console.WriteLine("  X"+"X"+"X"+"X"+"X");

        Console.WriteLine(" X"+"X"+"X"+"X"+"X"+"X"+"X");

        Console.WriteLine("  "+"  X"+" ");

    }

}