#include <iostream>
#include <vector>
#include <string>
#include <algorithm>

using namespace std;
void test01()
{
	vector<vector<int>> v;
	vector<int> v1;
	vector<int> v2;
	vector<int> v3;
	vector<int> v4;
	for (int i = 0; i < 4; i++)
	{
		v1.push_back(i + 1);
		v2.push_back(i + 2);
		v3.push_back(i + 3);
		v4.push_back(i + 4);
	}
	v.push_back(v1);
	v.push_back(v2);
	v.push_back(v3);
	v.push_back(v4);
	for (vector<vector<int>>::iterator it = v.begin(); it < v.end(); it++)
	{
		for (vector<int>::iterator vit = (*it).begin(); vit < (*it).end(); vit++)
		{
			cout << *vit << " ";
		}
		cout << endl;
	}
}

int main()
{
	test01();
	return 0;
}