import java.util.Scanner;
public class Main{
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        for (int j=0; j<n;j++){

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