using System;

public class Program

{

    public static void Main()

    {

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

            string b = "*";

            string c = ".";

            string v = "@";

            for(var i=a-1;i<a;i++)

                {

                    Console.WriteLine(" {0} ",new string('*',a+1));

                }

            for(var i=1;i<a;i++)

                {

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

                }

​

             for(var i=1; i<=a; i++)

                 {      

                 Console.WriteLine("{0}{1}{0}",b,new string('.',a*2-2));

                 }

            for(var i=1;i<=a;i++)

                {

                Console.WriteLine("{0}{1}{0}",b,new string('@',a*2-2));

                }

            for(var i=a-1;i<a;i++)

                {

                    Console.WriteLine("{0}",new String('*',a*2));

                }

    }

}