using System;

public class Program

{

    static void M (int n)

    {

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

        {

            for (int j = 1 ; j<=n ; j++)

            {

                if (i==1 || i==n || j==1 || j==n) {

                    Console.Write("*"); }

                    else {

                        Console.Write(" "); }

            }

            Console.WriteLine();

        }

    }

    public static void Main()

    {

        M(11);

    }

}