#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define rep(i, n) for (int i = 0; i < (n); i++)
#define P pair<int, int>
#define LP pair<ll, ll>

template<class T>
void chmax(T& a, T b) { a = max(a, b); };
template<class T>
void chmin(T& a, T b) { a = min(a, b); };

int main() {
  int n;
  cin >> n;
  map<P,P> mp;
  vector<int> x1(n),y1(n),x2(n),y2(n);
  rep(i,n) cin >> x1[i] >> y1[i] >> x2[i] >> y2[i];
  
  auto check = [&](int sx, int sy, int gx, int gy) {
    rep(i,n) {
      if (x1[i] == sx && y1[i] == sy) {
        sx = x2[i];
        sy = y2[i];
      }
    }
    if (sx==gx&&sy==gy) return true;
    else return false;
  };
  if (check(2,8,5,8)&&check(3,9,4,8)&&check(7,9,6,8)) {
    cout << "YES" << endl;
  } else {
    cout << "NO" << endl;
  }


  return 0;
}