#include <bits/stdc++.h>
using namespace std;
#define IOS ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
typedef long long ll;
// Welcome to my source code!

template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return true; } return false; }
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; }

int main() {
    int n;
    cin >> n;
    pair<int, int> abc[3] = { make_pair(2, 8), make_pair(3, 9), make_pair(7, 9) };
    int x[2], y[2];
    while (n--) {
        cin >> x[0] >> y[0] >> x[1] >> y[1];
        for (int i = 0; i < 3; i++) {
            if (abc[i] == make_pair(x[0], y[0])) {
                abc[i] = make_pair(x[1], y[1]);
                break;
            }
        }
    }
    pair<int, int> t[3] = { make_pair(5, 8), make_pair(4, 8), make_pair(6, 8) };
    if (abc[0] == t[0] && abc[1] == t[1] && abc[2] == t[2]) cout << "YES" << endl;
    else cout << "NO" << endl;
}