using System;

public class Program

{

    public static void Main()

    {

        int n;

        do {

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

        } while ( (n < 2) && (n > 100));

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

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

                for ( int k = 1; k <= n; k++ ){

                    Console.Write("*");

                }

                Console.WriteLine();

            }

            else {

                Console.Write("*");

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

                    Console.Write(" ");

                }

                Console.WriteLine("*");

            }

        }

    }

}