using System;

public class Program

{

    public static void Main()

    {

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

        int star = 0;

        for (int row = 0; row < n; row++)

        {

            for (int col = 0; col < n; col++)

            {

                if (col == star)

                {

                    Console.Write("*");   

                }

                else{

                    Console.Write(".");

                }

            }

            Console.WriteLine();

            star++;

        }

​

        star -= 2;

​

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

        {

            for (int col = 0; col < n; col++)

            {

                if (col == star)

                {

                    Console.Write("*");

                }

                else

                {

                    Console.Write(".");

                }

            }

            Console.WriteLine();

            star--;

        }

    }

}