using System;

​

public class Program

{

    public static void Main()

    {

        int six = 6;

        int length = 20;

        for (int i = 5; i > 0; i--)

        {

            for (int j = 0; j < i; j++)

            {

                Console.Write("*");

            }

​

            for (int j = 0; j < length - six; j++)

            {

                Console.Write(" ");

            }

​

            for (int j = 0; j < six - i; j++)

            {

                Console.Write("*");

            }

​

            Console.WriteLine();

        }

    }

}