#include <iostream>
using namespace std; 
int main(){
	int a,b,s[8],c=1;
	for(int i=1;i<=7;i++){
		cin>>a>>b;
		if((a+b)>8) s[i]=a+b;
		else s[i]=0;
	}
	for(int i=1;i<=6;i++){
		if(s[i+1]>(s[i])&&s[i+1]>s[c]) c=i+1;
	}
	cout<<c<<endl;
	return 0; 
}