using System;

public class Program

{

    public static void Main()

    {

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

            string a = "";

            string b = "";

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

            {

                a = a + "*";

            }

            Console.WriteLine(a);

            for (int k = 2; k <= n - 1; k++)

                {

                    b = b + " ";

                }

            for (int k = 2; k <= n - 1; k++)

            {

                Console.WriteLine("*{0}*", b);

            }

                Console.WriteLine(a);

        }

    }