#include<iostream>
using namespace std;
int main()
{
    int a[7],a1,a2,answer;
    for(int i=1;i<=7;i++){
        cin>>a1>>a2;
        a[i]=a1+a2;
        a1=0;
        a2=0;
    }
    answer=0;
    for(int i=1;i<=7;i++){
        if(a[i]>=8&&a[i]>a[answer]){
            answer=i;
        }
    }
    cout<<answer;
	return 0;
}