using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("        *           ");

        Console.WriteLine("       * *          ");

        Console.WriteLine("      * * *         ");

        Console.WriteLine("     * * * *        ");

        Console.WriteLine("    * * * * *       ");

        Console.WriteLine("    * * * * *       ");

        Console.WriteLine("     * * * *        ");

        Console.WriteLine("      * * *         ");

        Console.WriteLine("       * *          ");

        Console.WriteLine("        *           ");

    }

}