import java.util.; public class Main { public static void main(String[] args) { Scanner sc=new Scanner(System.in); int n=sc.nextInt(); for(int i=1;i<=n;i++){ for(int j=1;j<=n;j++){ if(j==1 ||(i==n&&j!=n)||(i==1&&j!=n)||(j==n&&i!=1&&i!=n)) System.out.print(""); else System.out.print(" "); } System.out.println(""); } } }