#include<iostream>
using namespace std;
int main()
{
	int a[7][2]={0};//每天的课程
	int day = 0;//星期几
	int temp = 0;//
	for (int i = 0; i < 7; i++)
	{
		for (int j = 0; j < 2; j++)
		{
			cin >> a[i][j];
		}
	}
	for (int i = 0; i < 7; i++)
	{
		if (a[i][0] + a[i][1] > 8&&a[i][0]>temp)
		{
			temp = a[i][0] + a[i][1];
			day = i + 1;
		}
	}
	cout << day  << endl;
}