package com.company;

import java.util.Scanner;


public class HardTask {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int input = Integer.parseInt(scanner.nextLine());
        for(int i = 1;i <= input;i++){
            for(int j = 1;j <= i; j++){
                System.out.print(j + " ");
            }
            System.out.println();
        }
        for(int k = input;k >= 1;k--){
            for(int f = 1; f < k;f++){
                System.out.print(f + " ");
            }
            System.out.println();
        }

    }
}