#include <iostream>
#include <cstdlib>
using namespace std;
const int N = 7;
int n,m,d,maxn;
int main(){
int res = 0;
for(int i = 0;i < N;++i){
cin >> n >> m;
res = n + m;
if(res > 8 && res > maxn){
maxn = n + m;
d = i + 1;
}
}
if(maxn <= 8) puts("0");
else cout << d << endl;
return 0;
}