#include <bits/stdc++.h>

using namespace std;
using pii = pair<int, int>;

vector<pii> pos = {make_pair(2, 8), make_pair(3, 9), make_pair(7, 9)};

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int N;
  cin >> N;
  vector<pii> from(N), to(N);
  for (int i = 0; i < N; i++) {
    int x, y;
    cin >> x >> y;
    from[i] = make_pair(x, y);
    cin >> x >> y;
    to[i] = make_pair(x, y);
  }
  for (int i = 0; i < N; i++) {
    for (int j = 0; j < 3; j++) {
      if (pos[j].first == from[i].first && pos[j].second == from[i].second) {
        pos[j] = to[i];
      }
    }
  }
  if (pos[0].first == 5 && pos[0].second == 8 && pos[1].first == 4 &&
      pos[1].second == 8 && pos[2].first == 6 && pos[2].second == 8) {
    cout << "YES" << '\n';
  } else {
    cout << "NO" << '\n';
  }
  return 0;
}