using System;

using System.Linq;

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("   ****");

        PrintOctagon(4);

    }

    public static void PrintOctagon(int width) {

        for (int i = 0; i < width; i++) {

            Console.WriteLine(string.Concat(Enumerable.Repeat(" ", width - i - 1)) + string.Concat(Enumerable.Repeat("*", width + i * 2))); 

        }

        for (int i = 0; i < width - 2; i++) {

            string.Concat(Enumerable.Repeat("*", width + i * 2))

        }

        for (int i = 0; i < width; i++) {

            Console.WriteLine(string.Concat(Enumerable.Repeat(" ", width - (width - i))) + string.Concat(Enumerable.Repeat("*", width * 2 - (i * 2) + 2))); 

        }

    }

}