#include<iostream>

#include<cstdio>

#include<algorithm>

using namespace std;

int main()

{

    int t;

    int x1,y1,r1,x2,y2,r2;

    scanf("%d",&t);

    while(t--)

    {

        scanf("%d%d%d%d%d%d",&x1,&y1,&r1,&x2,&y2,&r2);

        int disc = (x2-x1)*(x2-x1) + (y2-y1)*(y2-y1);

        int disr1 = r1*r1 + *r1*r2 + r2*r2;

        int disr2 = r1*r1 - *r1*r2 + r2*r2;

        if(x1==x2 && y1 == y2 && r1 == r2)

        puts("-1");

        else if(disc > disr1) puts("");

        else if(disc == disr1) puts("");

        else if(disc < disr1 && disc > disr2) puts("");

        else if(disc == disr2) puts("");

        else puts("");

    }

    return ;

}