#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
using namespace std;
signed main() {
  ios::sync_with_stdio(false); cin.tie(0);
  int n;
  cin >> n;
  pair<int, int> pos[3] = {{2, 8}, {3, 9}, {7, 9}};
  for (int i = 0; i < n; i++) {
    pair<int, int> from, to;
    cin >> from.first >> from.second;
    cin >> to.first >> to.second;
    for (int j = 0; j < 3; j++) {
      if (pos[j] == from) {
        pos[j] = to;
        break;
      }
    }
  }
  if (pos[0] == make_pair(5, 8) && pos[1] == make_pair(4, 8) && pos[2] == make_pair(6, 8)) {
    cout << "YES" << endl;
  } else {
    cout << "NO" << endl;
  }
  return 0;
}