#include <iostream>

using namespace std;

int n, ans = -1;
int x[10010][5];
//x[1]为a，……以此类推

int main()
{
    cin >> n;
    for (int i = 1; i <= n; i++)
    {
        cin >> x[i][1] >> x[i][2] >> x[i][3] >> x[i][4];
    }
    int a, b;
    cin >> a >> b;
    for (int i = n; i >= 0; i--)
    {
        if ((x[i][1] <= a && x[i][2] <= b) && (x[i][3] >= a && x[i][4] >= b))
        {
            ans = i;
            break;
        }
    }
    cout << ans << endl;
}