#include <cstring>
#include <stdio.h>
#include <algorithm>
using namespace std;
int arr[100];
int main()
{
int a,b,ans=-1,sum=0;
for( int j=1;j<=7;j++)
{
cin>>a>>b;
arr[j]=a+b;
if(arr[j]>8&&arr[j]>ans)
{
ans=arr[j]; sum=j;
}
}
cout<<sum;
return 0;
}