using System;

public class Program

{

    public static void Main()

    {

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

        int dots = 0;

        int stars = n;

​

        for (int i = 0; i < n / 2 + 1; i++)

        {

                dots = i;

​

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

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

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

​

                stars = stars - 2;

                Console.WriteLine();       

        }

        stars = stars + 4;

​

        for (int i = n / 2 - 1; i >= 0; i--)

        {

​

            dots = i;

​

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

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

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

​

            stars = stars + 2;

            Console.WriteLine();

​

        }

    }

}