#include <bits/stdc++.h>
#define REP(i, n) for(int i = 0;i < n;i++)
#define ll long long
using namespace std;
//typedef vector<unsigned int>vec;
//typedef vector<ll>vec;
//typedef vector<vec> mat;
typedef pair<int, int> P;
typedef pair<ll,ll> LP;
const int dx[8] = {1, 0, -1, 0, 1, -1, -1, 1};
const int dy[8] = {0, 1, 0, -1, 1, 1, -1, -1};
const int INF = 1000000000;
const ll LINF = 1000000000000000000;//1e18
const ll  MOD = 1000000007;
const double PI = acos(-1.0);
const double EPS = 1e-10;

template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return true; } return false; }
//template<class T> inline void add(T &a, T b){a = ((a+b) % MOD + MOD) % MOD;};


int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    pair<int, int> A, B, C;
    A.first = 2, A.second = 8;
    B.first = 3, B.second = 9;
    C.first = 7, C.second = 9;
    int N;
    cin >> N;
    REP(i,N){
        int x1, y1, x2, y2;
        cin >> x1 >> y1 >> x2 >> y2;
        if(A == make_pair(x1, y1)) A = make_pair(x2, y2);
        if(B == make_pair(x1, y1)) B = make_pair(x2, y2);
        if(C == make_pair(x1, y1)) C = make_pair(x2, y2);
    }
    if(A == make_pair(5, 8) && B == make_pair(4, 8) && C == make_pair(6, 8)) cout << "YES" << endl;
    else cout << "NO" << endl;
}