#include<iostream>
using namespace std;
int main() {
	int a[7][2];
	int unup[7];
	int j,max=0;
	for (int i = 0; i < 7; i++) {
		for (int j = 0; j < 2; j++) {
			cin >> a[i][j];
		}
		int sum = a[i][0] + a[i][1];
		if (sum > 8) {
			unup[i] = sum;
		}
		else unup[i] = 0;
	}
	for (int i = 0; i < 7; i++) {
		unup[i] > max ? max = unup[i] : max = max;
	}
	for (j = 0; j < 7; j++) {
		if (unup[j] == max)
			break;
	}
	if (max == 0)cout << 0;
	else cout << j+1;
	return 0;
}