#include <iostream>
using namespace std;
int main()
{
	int x,y,ans = 0,sum = 0,max = -1,max1 = 0;
	for (int i = 7;i >= 1;i--){
		cin >> x >> y;
		sum = x + y;
		if(sum > 8){
			max1 = x + y - 8;
			if (max1 > max){
				ans = i;
			}
		}
		sum = 0;
	}
	cout << ans;
	return 0;
}