#include <iostream>

using namespace std;

int main() {
    int a, b, h, s=0;
    int res = 0;
    for (int i = 1; i <= 7; ++i) {
        cin >> a >> b;
        h = a + b;
        if (h > 8 && s < h) {
            s = h;
            res = i;
        }
    }

    cout << res << endl;

    return 0;
}