#include <bits/stdc++.h>
using namespace std;
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) begin(v),end(v)
template<typename A, typename B> inline bool chmax(A & a, const B & b) { if (a < b) { a = b; return true; } return false; }
template<typename A, typename B> inline bool chmin(A & a, const B & b) { if (a > b) { a = b; return true; } return false; }
using ll = long long;
using pii = pair<int, int>;
constexpr ll INF = 1ll<<30;
constexpr ll longINF = 1ll<<60;
constexpr ll MOD = 1000000007;
constexpr bool debug = false;
//---------------------------------//

int main() {
	int N;
	cin >> N;
	vector<pii> prd = {{2, 8}, {3, 9}, {7, 9}};
	REP(i, N) {
		int x1, y1, x2, y2;
		cin >> x1 >> y1 >> x2 >> y2;
		REP(i, 3) if (prd[i] == pii{x1, y1}) prd[i] = {x2, y2};
	}
	vector<pii> ans = {{5, 8}, {4, 8}, {6, 8}};
	if (prd == ans) puts("YES");
	else puts("NO");
}