#include<iostream>
using namespace std;
int main(){
    int a,b,sum,max=0,i,day=0;
    for(i=1;i<=7;i++){
        cin>>a>>b;
        sum=a+b;
        if(sum>max&&sum>8){
            max=sum;
            day=i;
        }
    }
    cout<<day;
    return 0;
}

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