#include <bits/stdc++.h>
using namespace std;
int main(){
int sum;
    int day[20];
    int s;
    int max=0;
    for(int i=0;i<14;i+=2){
        int a,b;
        cin>>a;
        cin>>b;
        day[i]=a;day[i+1]=b;
}

    //输出
    for(int j=0;j<14;j+=2){
        sum=day[j]+day[j+1];
        if(sum>=8&&sum>max){
            s=(j/2)+1;
            max=sum;

};
}
    if(s==0){
        cout<<0;
}else{
        cout<<s;
}
return 0;
}

走过路过，看看咋回事