using System;

public class Program

{

    public static void Main()

    {

        int val = 15;

        int i, j, k;

        i = j = k = 1;

        while(i <= val)

        {

            while(j <= (val - i))

            {

                Console.Write(" ");

                j++;

            }

            while(k <= i)

            {

                Console.Write(" *");

                k++;

            }

            Console.WriteLine("");

            i++;

            k = j = 1;

        }

        i = 1;

        j = k = 0;

        while(i < val)

        {

            while(j < i)

            {

                Console.Write(" ");

                j++;

            }

            while(k < (val - i))

            {

                Console.Write(" *");

                k++;

            }

            Console.WriteLine("");

            i++;

            k = j = 0;

        }

        Console.ReadLine();

    }

}