#include <iostream>
#include <algorithm>
using namespace std;
int main()
{
	int a,b,t(0),ans(0);
	for(int i=1;i<=7;i++)
	{
		cin>>a>>b;
		a+=b;
		if(a>8&&t<a)
			ans=i,t=a;
	}
	cout<<ans<<endl;
	return 0;
}
/**************************************************************
	Problem: 2244
	User: admin
	Language: C++
	Result: Accepted
	Time:49 ms
	Memory:2072 kb
****************************************************************/