using System;

public class Program

{

    public static void Top(int c)

    {

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

        {

            for (int b = 1; b <= c - a; b++)

            {

            Console.Write(" ");

            Console.Write("*");

            }

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

            {

                Console.Write(" *");

                Console.WriteLine();

            }

        }

    }

    public static void Bot(int c)

    {

        for(int a = c-1; a >= 1;a--)

        {

            for (int b = 1; b <= c ; b++)

            {

            Console.Write(" ");

            Console.Write("*");

            }

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

            {

                Console.Write(" *");

                Console.WriteLine();

            }

        }

    }

    public static void Main()

    {

        int n = int.Parse(Console.ReadLine());

        Top(n);

        Bot(n);

    }

}