#define _USE_MATH_DEFINES

#include <iostream>		//cin, cout
#include <vector>		//vector
#include <algorithm>	//sort,min,max,count
#include <string>		//string,getline, to_string
#include <cstdlib>		//abs(int)
#include <utility>		//swap, pair
#include <tuple>        //tuple
#include <deque>		//deque
#include <climits>		//INT_MAX
#include <bitset>		//bitset
#include <cmath>		//sqrt, ceil. M_PI, pow, sin
#include <ios>			//fixed
#include <iomanip>		//setprecision
#include <sstream>		//stringstream
#include <numeric>		//gcd, assumlate
#include <random>		//randam_device
#include <limits>		//numeric_limits

using namespace std;
constexpr long long int D_MOD = 1000000007;

int main() {

	int N;
	cin >> N;

	int AX = 2, AY = 8;
	int BX = 3, BY = 9;
	int CX = 7, CY = 9;

	int x11, y11, x12, y12;
	for (int i = 0; i < N; i++) {
		cin >> x11 >> y11 >> x12 >> y12;

		if (x11 == AX && y11 == AY) {
			AX = x12;
			AY = y12;
		}
		else if (x11 == BX && y11 == BY) {
			BX = x12;
			BY = y12;
		}
		else if (x11 == CX && y11 == CY) {
			CX = x12;
			CY = y12;
		}
	}

	if (AX == 5 && AY == 8 && BX == 4 && BY == 8 && CX == 6 && CY == 8) {
		cout << "YES" << endl;
	}
	else {
		cout << "NO" << endl;
	}

	return 0;

}