#include<bits/stdc++.h>
using namespace std;
typedef long long ll;


signed main(){
    ios::sync_with_stdio(false);
	cin.tie(0);

    int n;
    cin>>n;
    pair<int,int> a,b,c;
    a = make_pair(2,8);
    b = make_pair(3,9);
    c = make_pair(7,9);

    for(int i=0;i<n;i++){
        int x,y;
        cin>>x>>y;
        pair<int,int> s = make_pair(x,y);
        cin>>x>>y;
        if(s==a) a = make_pair(x,y);
        if(s==b) b = make_pair(x,y);
        if(s==c) c = make_pair(x,y);
    }
    if(a==make_pair(5,8) && b == make_pair(4,8) && c == make_pair(6,8)){
        cout<<"YES"<<endl;
        return 0;
    }
    cout<<"NO"<<endl;
}