#include <stdio.h>
int main(){
    int n;
    scanf("%d",&n);
    while(n--){
        int a,b,c[10],i=0,num=7,max;
        while(num--){
            scanf("%d%d",&a,&b);
            c[i]=a+b;i++;
        }max=c[0];i=0;
        while(i<7){
            if(c[i]>max)max=c[i];
            i++;
        }i=0;
        while(i<7){
            if(c[i]==max)break;
            i++;
        }
        if(max<=8)printf("0\n");
        else printf("%d\n",i+1);
    }
}