#include <bits/stdc++.h>

int ri() {
	int n;
	scanf("%d", &n);
	return n;
}

int main () {
	int n = ri();
	std::pair<int, int> a[9][9];
	for (int i = 0; i < 9; i++)
		for (int j = 0; j < 9; j++) a[i][j] = {i, j};
	for (int i = 0; i < n; i++) {
		int x1 = ri() - 1;
		int y1 = ri() - 1;
		int x2 = ri() - 1;
		int y2 = ri() - 1;
		a[x2][y2] = a[x1][y1];
		a[x1][y1] = {-1, -1};
	}
	std::cout << (a[4][7] == std::pair<int,int>{1, 7} && a[3][7] == std::pair<int,int>{2, 8} && a[5][7] == std::pair<int,int>{6, 8} ? "YES" : "NO") << std::endl; 
	return 0;
}