import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner myScanner=new Scanner(System.in);
        int d=0,e=0;

        for(int i=1;i<=7;i++){
            int a=myScanner.nextInt();
            int b=myScanner.nextInt();
            int c=a+b;
            if(c>8&&d<=c){
               if(d==c){

                }else{
                    e=i;
                    d=c;
                }
            }
            if(i==7&&d>8){
                System.out.println(e);
            }
        }
    }
}