#define _USE_MATH_DEFINES
#include  <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
#include <string>
#include<math.h>
#include<iomanip>
#include<stdio.h>
#include <stdlib.h>
#include<stdio.h>
#include <queue>
#include<map>
#include <sstream>
#include<set>
#include<stack>
#include<time.h>
#include <sys/types.h>
#include <tuple>
#include <numeric>


typedef long long int ll;
//#include<bits/stdc++.h>


using namespace std;







int main()
{

    int Q;
    Q = 1;
    //cin >> Q;

    while (Q--) {
        int n;
        cin >> n;
        map<char,pair<int, int>>t;
        t['A'] = {2,8};
        t['B'] = { 3,9 };
        t['C'] = { 7,9 };

        for (int i = 0; i < n; i++) {
            int a, b, c, d;
            cin >> a >> b >> c >> d;
            if (t['A'] == make_pair(a, b)) {
                t['A'] = make_pair(c, d);
            }
            else if (t['B'] == make_pair(a, b)) {
                t['B'] = make_pair(c, d);
            }
            else if (t['C'] == make_pair(a, b)) {
                t['C'] = make_pair(c, d);
            }


        }
        if (t['A'] == make_pair(5, 8) && t['B'] == make_pair(4, 8) && t['C'] == make_pair(6, 8)) {
            cout << "YES" << endl;
        }
        else cout << "NO" << endl;






    }
    return 0;
}