#include <bits/stdc++.h>

using namespace std;

#define REP(i,n) for(int i=0; i<(int)(n); i++)
#define FOR(i,b,e) for (int i=(int)(b); i<(int)(e); i++)
#define ALL(x) (x).begin(), (x).end()

const double PI = acos(-1);

int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);

  vector<string> x(10, string(10, '#'));
  x[2][8] = 'A';
  x[3][9] = 'B';
  x[7][9] = 'C';
  
  int n; cin >> n;
  REP (i, n) {
    int a, b, c, d;
    cin >> a >> b >> c >> d;
    swap(x[a][b], x[c][d]);
  }
  
  if (x[5][8] == 'A' && x[4][8] == 'B' && x[6][8] == 'C')
    cout << "YES" << endl;
  else
    cout << "NO" << endl;
  
  return 0;
}