#include<iostream>
#include<math.h>
#include<string.h>
#include<vector>
#include<algorithm>
#include<iomanip>
#include<deque>
using namespace std;

int main(){
	
	char c[10][10];
	
	c[2][8]='A';
	c[3][9]='B';
	c[7][9]='C';
	
	int n;
	cin >> n;
	for(int i=0;i<n;i++){
		int x1,y1,x2,y2;
		cin >> x1 >> y1 >> x2 >> y2;
		c[x2][y2]=c[x1][y1];
	}
	if(c[5][8]=='A' && c[4][8]=='B' && c[6][8]=='C'){
		cout << "YES" << endl;
	}else{
		cout << "NO" << endl;
	}
		
	return 0;
}