import java.util.Scanner;
public class p1085 {
    public static void main(String[] args){
        int[][] a;
        a = new int [2][7];
        Scanner scanner = new Scanner(System.in);
        for (int m = 0; m < 7; m++) {
            for(int n = 0; n < 2; n++)
                a[n][m] = scanner.nextInt();
        }
        int[] b;
        b = new int [7];
        for (int i = 0; i < 7; i++) {
            b[i] = a[0][i] + a[1][i];
            if(b[i]>8){
                System.out.println(i+1);
                break;
            }
        }




    }
}