#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
  #define _GLIBCXX_DEBUG
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  int n;
  cin >> n;
  pair<int, int> a = { 2, 8 }, b = { 3, 9 }, c = { 7, 9 };
  while (n--) {
    int x1, y1, x2, y2;
    cin >> x1 >> y1 >> x2 >> y2;
    if (a == make_pair(x1, y1)) a = { x2, y2 };
    if (b == make_pair(x1, y1)) b = { x2, y2 };
    if (c == make_pair(x1, y1)) c = { x2, y2 };
  }
  bool ok = true;
  ok &= (a == make_pair(5, 8));
  ok &= (b == make_pair(4, 8));
  ok &= (c == make_pair(6, 8));
  cout << (ok ? "YES" : "NO") << endl;
  return 0;
}