#include<iostream>  
#include<limits>   
  
using namespace std;  
  
class jinjin {  
public:  
    int a[7], b[7];  
  
    void setValues() {  
        for(int i = 0; i < 7; i++) {  
            cin >> a[i] >> b[i];  
        }  
    }  
  
    
    int findMostUnhappyDay() {  
        int mostUnhappyDay = 0;  
        int longestHours = 0;  
  
        for(int n = 0; n < 7; n++) {  
            if(a[n] + b[n] > 8 && a[n] + b[n] > longestHours) {  
                longestHours = a[n] + b[n];  
                mostUnhappyDay = n + 1;  
            }  
        }  
  
        return mostUnhappyDay;  
    }  
  
    void checkValues() {  
        int day = findMostUnhappyDay();  
        if(day != 0) {  
            cout << day << endl;  
        } 
    }  
};  
  
int main() {  
    jinjin j;  
    j.setValues();  
    j.checkValues();  
  
    return 0;  
}