#include<iostream>
#include<algorithm>
using namespace std;
const int N = 10;
int a[N];
int main()
{
int n = 7;
int sum = 0;
int idx = 1;
int res = 0;
while(n --)
{
int a, b;
cin >> a >> b;
if( a + b > 8 && a + b > sum) sum = max(sum, a + b), res = idx;
idx ++;
}
cout << res << endl;
return 0;
}