#include <iostream>

using namespace std;

int main() {
	int m, n, max = 0, result = 0;
	for (int i = 1; i <= 7; i++) {
		 cin >> m >> n;
		if (m + n >= 8 && m + n > max) {
			max = m + n;
			result = i;
		}
	}

	cout << result;

	return 0;
}