using System;

public class Program

{

    public static void Main()

    {

        int size=6;

        for (int a=1; a<size; a++)

        {

            for (int b=size; b>a; b--)

                Console.Write(" ");

            Console.Write("*"); 

            for (int c=3; c<a*2; c++)

                Console.Write(" ");

            if (a>1)

                Console.WriteLine("*");

            else

                Console.WriteLine();

        }       

​

        for (int a=size-2; a>0; a--)

        {

            for (int b=size; b>a; b--)

                Console.Write(" ");

            Console.Write("*"); 

            for (int c=3; c<a*2; c++)

                Console.Write(" ");

            if (a>1)

                Console.WriteLine("*");

            else

                Console.WriteLine();

        }       

​

    }

}