#include <bits/stdc++.h>

using namespace std;

int main() {
    int x, y, max = INT32_MIN, day = 0;
    for (int i = 0; i < 7; ++i) {
        cin >> x >> y;
        if (x + y > 8) {
            //不高兴
            if (x + y > max) {
                max = x + y;
                day = i + 1;
            }
        }
    }
    cout << day << endl;
    return 0;
}