// #define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); ++i)
int main() {
    // Input 
    int N;
    cin >> N;
    vector<int> x1(N), y1(N), x2(N), y2(N);
    rep(i, N) cin >> x1[i] >> y1[i] >> x2[i] >> y2[i];

    // Simulate
    pair<int, int> koma[3] = {{2, 8}, {3, 9}, {7, 9}};
    rep(i, N) {
        rep(j, 3) {
            if (koma[j] == make_pair(x1[i], y1[i])) {
                koma[j] = {x2[i], y2[i]};
                break;
            }
        }
    }

    // Judge
    pair<int, int> _koma[3] = {{5, 8}, {4, 8}, {6, 8}};
    bool ok = true;
    rep(i, 3) if (koma[i] != _koma[i]) ok = false;

    // Output
    cout << (ok ? "YES" : "NO") << endl;
}