#include <bits/stdc++.h>

using namespace std;

using ll = long long;
using P = pair<int, int>;

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    int n;
    cin >> n;

    int xx1 = 2, yy1 = 8, xx2 = 3, yy2 = 9, xx3 = 7, yy3 = 9;

    int hoge = 0;
    for (int i = 0; i < n; i++) {
        int x1, y1, x2, y2;
        cin >> x1 >> y1 >> x2 >> y2;
        if (x1 == xx1 && y1 == yy1) {
            xx1 = x2;
            yy1 = y2;
        } else if (x1 == xx2 && y1 == yy2) {
            xx2 = x2;
            yy2 = y2;
        } else if (x1 == xx3 && y1 == yy3) {
            xx3 = x2;
            yy3 = y2;
        }
    }

    if (xx1 == 5 && yy1 == 8) hoge |= 1;
    if (xx2 == 4 && yy2 == 8) hoge |= 2;
    if (xx3 == 6 && yy3 == 8) hoge |= 4;
    cout << (hoge == 7 ? "YES" : "NO") << endl;
    return 0;
}