using System;

class Program
{
    static void Main(string[] args)
    {
        var n = int.Parse(Console.ReadLine());

        for (int row = 0; row < n ; row++)
        {
            Console.Write(new string(' ', n - row - 1));
            Console.Write('*');
            for (int stars = 1; stars <= row ; stars++)
            {
                Console.Write(" *");
            }
            Console.WriteLine();
        }
        for (int roww = n - 1; roww >= 1; roww--)
        {
            Console.Write(new string(' ', n - roww - 1));
            for (int stars = 1; stars <= roww; stars++)
            {
                Console.Write(" *");
            }
            Console.WriteLine();
        }

    }
}