using System;

public class Program

{

    public static void Main()

    {

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

        int asterisks = 1;

        int dots = n - 2;

​

        for (int i = 0; i < n - 1; i++)

        {

            Console.Write(new string('.', dots));

            Console.Write(new string('*', asterisks));

            Console.Write(new string('.', dots));

​

            asterisks += 2;

            dots--;

​

            Console.WriteLine();

​

        }

​

        dots = n - 2;

        Console.Write(new string('.', dots));

        Console.Write("*");

        Console.Write(new string('.', dots));

    }

}