#include <bits/stdc++.h>

using namespace std;
typedef pair<int, int> P;
typedef pair<P, P> P2;

int main() {
  int n;
  cin >> n;
  vector<P2> xy(n);
  for (int i = 0; i < n; ++i) {
    int x, y;
    cin >> x >> y;
    P one = P(x, y);
    cin >> x >> y;
    P two = P(x, y);
    xy[i] = P2(one, two);
  }

  int cx = 2, cy = 8;
  for (int i = 0; i < n; ++i) {
    P2 cur = xy[i];
    if (cur.first.first == cx && cur.first.second == cy) {
      cx = cur.second.first;
      cy = cur.second.second;
    }
  }
  if (cx != 5 || cy != 8) {
    puts("NO");
    return 0;
  }

  cx = 3; cy = 9;
  for (int i = 0; i < n; ++i) {
    P2 cur = xy[i];
    if (cur.first.first == cx && cur.first.second == cy) {
      cx = cur.second.first;
      cy = cur.second.second;
    }
  }
  if (cx != 4 || cy != 8) {
    puts("NO");
    return 0;
  }

  cx = 7; cy = 9;
  for (int i = 0; i < n; ++i) {
    P2 cur = xy[i];
    if (cur.first.first == cx && cur.first.second == cy) {
      cx = cur.second.first;
      cy = cur.second.second;
    }
  }
  if (cx != 6 || cy != 8) {
    puts("NO");
    return 0;
  }    

  puts("YES");
  return 0;
}