import java.util.Scanner;

/**
 * Created by Lenovo on 7.3.2017 г..
 */
public class zada4a6  {
    public static void main(String[] args)  {

        Scanner console = new Scanner(System.in);

        int n = Integer.parseInt(console.nextLine());
        for (int J = 0; j <n; i++) {
            System.out.println("*");
        }
        (System.out.println();
        for (int i = 0; i <n-2 ; i++) {
            for (int j = 0; j < n; j++) {
             if (j==0||j==n-1) {
                 System.out.print("*");
                 else{
                     System.out.print("");
                 }
             }
             System.out.println();

            }
            for (int j = 0; j < ; j++) {
                System.out.println("*");

            }
            System.out.println();
        }
        }
}