#include <cstdio>
#include <cstring>
#include <iostream>
#include <string>
#include <cmath>
#include <bitset>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <deque>
#include <algorithm>
#include <complex>
#include <unordered_map>
#include <unordered_set>
#include <random>
#include <cassert>
#include <fstream>
#include <utility>
#include <functional>
#define popcount __builtin_popcount
using namespace std;
typedef long long int ll;
typedef pair<int, int> P;

int main()
{
	int n; cin>>n;
	int x[3]={2, 3, 7}, y[3]={8, 9, 9};
	for(int i=0; i<n; i++){
		int x1, y1, x2, y2; cin>>x1>>y1>>x2>>y2;
		for(int j=0; j<3; j++){
			if(x1==x[j] && y1==y[j]){
				x[j]=x2, y[j]=y2;
			}
		}
	}
	if(x[0]==5 && y[0]==8 && x[1]==4 && y[1]==8 && x[2]==6 && y[2]==8){
		cout<<"YES"<<endl;
	}else{
		cout<<"NO"<<endl;
	}
	return 0;
}