using System;

public class Program

{

    public static void Main()

    {

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

        for (var row = 1; row <= n; row++)

        {

            for (var col = 1; col <= n-row; col++)

            {

            Console.Write(" ");

            }

            Console.Write("*");

            for (var col = 1; col < row; col++)

            {

            Console.Write(" *");

            }

            Console.WriteLine();

        }

        for (var row = 1; row <= n; row--)

        {

            for (var col = 1; col <= n-row; col--)

            {

            Console.Write(" ");

            }

            Console.Write("*");

            for (var col = 1; col < row; col--)

            {

            Console.Write(" *");

            }

            Console.WriteLine();

        }

    }

}