#include <bits/stdc++.h>
using namespace std;


int main(void)
{
	int n;  cin >> n;

	pair<int, int> a(28, 0), b(39, 0), c(79, 0);
	int x1, y1, x2, y2;
	int before, after;      // 動かした駒の座標を整数に変換
	for(int i = 0; i < n; i++)
	{
		cin >> x1 >> y1 >> x2 >> y2;
 
		before = x1 * 10 + y1;
		after = x2 * 10 + y2;
		if (before == a.first && a.second == 0 || before == a.second)
			a.second = after;
		else if (before == b.first && b.second == 0 || before == b.second)
			b.second = after;
		else if (before == c.first && c.second == 0 || before == c.second)
			c.second = after;
	}

	if (a.first == 28 && a.second == 58 && b.first == 39 && b.second == 48 && c.first == 79 && c.second == 68)
		cout << "YES";
	else
		cout << "NO";

	return 0;
}