#include <bits/stdc++.h>
#define rep(i, a, n) for(int i = a; i < n; i++)
#define int long long
using namespace std;
typedef pair<int, int> P;
const int mod = 1000000007;
const int INF = 1e18;

signed main(){
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    int n;
    cin >> n;
    P p[11][11];
    rep(i, 0, 10){
        rep(j, 0, 10){
            p[i][j] = {i, j};
        }
    }
    rep(i, 0, n){
        int x, y, nx, ny;
        cin >> x >> y >> nx >> ny;
        p[nx - 1][ny - 1] = p[x - 1][y - 1];
        p[x - 1][y - 1] = {-1, -1};
    }
    if(p[4][7] == P{1, 7} && p[3][7] == P{2, 8} && p[5][7] == P{6, 8}) cout << "YES" << endl;
    else cout << "NO" << endl;
}