#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
int main()
{
int arr[7][2];
int i, j;
for (i = 0; i < 7; i++)
{
for (j = 0; j < 2; j++)
scanf("%d", &arr[i][j]);
}
int arr1[7];
for (i = 0; i < 7; i++)
arr1[i] = arr[i][0] + arr[i][1];
int max=0;
for (i = 1; i < 7; i++)
{
if (arr1[i] > arr1[max])
max = i;
}
if (arr1[max] <= 8)
printf("0");
else
printf("%d", max+1);
return 0;
}