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

int main(){
    char mas[30][30];
    memset(mas, '.', sizeof(mas));

    mas[2][8] = 'A';
    mas[3][9] = 'B';
    mas[7][9] = 'C';

    int n;
    cin >> n;

    for(int i = 0;i < n;i++){
        int x1, y1, x2, y2;
        cin >> x1 >> y1 >> x2 >> y2;
        mas[x2][y2] = mas[x1][y1];
        mas[x1][y1] = '.';
    }

    if(mas[5][8] == 'A' && mas[4][8] == 'B' && mas[6][8] == 'C'){
        cout << "YES" << endl;
    }else{
        cout << "NO" << endl;
    }

    return 0;
}