/*
 * P1085.c
 * 
 * Copyright 2022 Áº¿¡Ó <2251250136@qq.com>
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 * 
 * 
 */


#include <stdio.h>

int main(int argc, char **argv)
{
	int a[7][2];
	int max = 0;
	for (int i = 0; i < 7; i++){
		scanf("%d%d",&a[i][0],&a[i][1]);
	}
	for (int i = 0; i < 7; i++){
		if((a[max][0]+a[max][1]) < (a[i][0]+a[i][1]) && (a[i][0]+a[i][1]>8)){
			max = i;
		}
	}
	if(a[0][0]+a[0][1]<8&&a[1][0]+a[1][1]<8&&a[2][0]+a[2][1]<8&&a[3][0]+a[3][1]<8&&a[4][0]+a[4][1]<8&&a[5][0]+a[5][1]<8&&a[6][0]+a[6][1]<8){
		max=-1;
	}
	printf("%d",max+1);
	return 0;
}