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