#include <iostream>
#include <stdio.h>
#include <conio.h>
using namespace std;

int main() {
	int n = 4;
	int i,j;
	for (i = 0; i < n;i ++){
		for(j = 0; j < 20;j ++ ){
			cout << j + 1 << " ";
		}
		cout << "\n";
	}
	return 0;
}