using System;

public class Program

{

    public static void Main()

    {

        int i,j,x;

        //Console.WriteLine("Enter number of rows (half)");

        x = 10;//Convert.ToInt32(Console.ReadLine());

        for(i=1;i<x;i++)

        {

            for(j=1;j<x-i;j++)

            {

                Console.Write(" ");

            }

            for(j=1;j<2*i;j++)

            {

                Console.Write("*");

            }

            Console.WriteLine();

        }

        for(i=x-1;i>=1;i--)

        {

            for(j=0;j<x-i;j++)

            {

                Console.Write(" ");

            }

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

            {

                Console.Write("*");

            }

            Console.Write("\n");

            }

    }

}