#include<stdio.h>
int main() {
    int  a[8][8];
    int k[7];
    int m;
    int i = 0;
    for (m = 0; m < 7; m++) {
     scanf("%d %d", &a[m][0],&a[m][1]);
        k[i] = a[m][0] + a[m][1];
                i++; 
    }

    int p;
    int max=0;
    for (p = 0; p < 7; p++) {
        if (k[p] > max) {
            max = k[p];
        }
    }
      if(max< 9 ) printf("0");
      else {
          for (int c = 6; c >= 0; c--) {
       if(max > 8 && max == k[c])
          printf("%d", c+ 1);
          }
      }
    return 0;
}