#include<bits/stdc++.h>
#define db long double
const db eps=1e-8;
using namespace std;

struct xl{
	db x,y;
};
xl operator -(xl i,xl j) {
	return (xl){i.x-j.x,i.y-j.y};
}
xl operator +(xl i,xl j) {
	return (xl){i.x+j.x,i.y+j.y};
}
xl operator *(db i,xl j) {
	return (xl){i*j.x,i*j.y};
}
db operator ^(xl i,xl j) {
	return i.x*j.x+i.y*j.y;
}
db dis(xl i) {
	return sqrt(i^i);
}

bool check(xl a,xl b,xl c) {
	xl x=c-a,y=c-b;
	return abs((x^y)+dis(x)*dis(y))<=eps;
}
int main() {
	int T; scanf("%d",&T);
	while(T--) {
		xl a,b,c,d;
		scanf("%Lf%Lf%Lf%Lf%Lf%Lf%Lf%Lf",&a.x,&a.y,&b.x,&b.y,&c.x,&c.y,&d.x,&d.y);
		if(check(a,c,d)) {
			swap(b,c);
		} else if(check(b,c,d)) {
			swap(a,c);
		} 
		if(!check(a,b,d)) {
			puts("-1"); continue;
		}
		db k1=dis(a-d)/dis(a-b);
		xl ans=(xl){0,0};
		if(k1<=eps) {
			ans=b+0.5*(c-b);
		} else {
			if(k1<0.5) {
				swap(b,a);
				k1=1.0-k1;
			}
			db k2=0.5/k1;
			ans=a+k2*(c-a);
		}
		printf("%.12Lf %.12Lf\n",ans.x,ans.y);
	}
	return 0;
}