Problem: For given two segments s1 and s2, print the distance between them.

s1 is formed by end points p0 and p1, and s2 is formed by end points p2 and p3.

Constraints

* 1 ≤ q ≤ 1000
* -10000 ≤ xpi, ypi ≤ 10000
* p0 ≠ p1 and p2 ≠ p3.

Input

The entire input looks like:


q (the number of queries)
1st query
2nd query
...
qth query


Each query consists of integer coordinates of end points of s1 and s2 in the following format:


xp0 yp0 xp1 yp1 xp2 yp2 xp3 yp3


Output

For each query, print the distance. The output values should be in a decimal fraction with an error less than 0.00000001.

Example

Input

3
0 0 1 0 0 1 1 1
0 0 1 0 2 1 1 2
-1 0 1 0 0 1 0 -1


Output

1.0000000000
1.4142135624
0.0000000000

Solution (in CPP):

Solution:
#include<stdio.h>
#include<cstring>
#include<algorithm>
#include<vector>
#include<map>
#include<assert.h>
#include<set>
#include<cmath>
#include<queue>
#include<cstdlib>
#include<iostream>
#include<bitset>
#define pii pair<int,int>
#define fi first
#define se second
#define pb push_back
#define rep(i,j,k) for(int i=(int)(j);i<=(int)(k);i++)
#define per(i,j,k) for(int i=(int)(j);i>=(int)(k);i--)
using namespace std;
typedef long long LL;
//template
typedef double db;
const db eps=1e-10;
const db pi=acosl(-1.0);
int sign(db x){if(x<-eps)return -1;if(x>eps)return 1;return 0;}
int cmp(db x,db y){return sign(x-y);}
bool inmid(db x,db l,db r){return cmp(x,l)*cmp(x,r)<=0;}
struct po{
	db x,y;
	po(db _x=0,db _y=0):x(_x),y(_y){}
	void read(){scanf("%lf%lf",&x,&y);}
};
po operator +(const po &a,const po &b){return po(a.x+b.x,a.y+b.y);}
po operator -(const po &a,const po &b){return po(a.x-b.x,a.y-b.y);}
po operator *(const po &a,const db &b){return po(a.x*b,a.y*b);}
po operator /(const po &a,const db &b){return po(a.x/b,a.y/b);}
db operator *(const po &a,const po &b){return a.x*b.x+a.y*b.y;}
db operator ^(const po &a,const po &b){return a.x*b.y-a.y*b.x;}
db mo2(po a){return a*a;}
db mo(po a){return sqrt(a*a);}
po proj(po x,po y){//proj x to y
	return y*((x*y)/mo2(y));
}
po refl(po x,po y){//refl x from y
	return proj(x,y)*2-x;
}
bool onseg(po x,po l,po r){
	return (sign((x-l)^(r-l))==0)&&inmid(x.x,l.x,r.x)&&inmid(x.y,l.y,r.y);
}
bool inter(db l1,db r1,db l2,db r2){
	if(cmp(l1,r1)==1)swap(l1,r1);
	if(cmp(l2,r2)==1)swap(l2,r2);
	return cmp(min(r1,r2),max(l1,l2))>=0;
}
bool checkss(po a,po b,po c,po d){
	return sign((b-a)^(c-a))*sign((b-a)^(d-a))<=0&&sign((d-c)^(a-c))*sign((d-c)^(b-c))<=0&&inter(a.x,b.x,c.x,d.x)&&inter(a.y,b.y,c.y,d.y);
}
po getll(po a,po b,po c,po d){
	db u=((b-a)^(c-a));
	db v=((d-a)^(b-a));
	return (c*v+d*u)/(u+v);
}
db dispp(po x,po y){return sqrt((x-y)*(x-y));}
db disps(po x,po l,po r){
	po y=proj(x-l,r-l)+l;
	if(onseg(y,l,r))return dispp(x,y);
	else return min(dispp(x,l),dispp(x,r));
}
db disss(po x,po y,po l,po r){
	if(checkss(x,y,l,r))return 0;
	return min(min(disps(x,l,r),disps(y,l,r)),min(disps(l,x,y),disps(r,x,y)));
}
//template
int main(){
	int t;scanf("%d",&t);
	while(t--){
		po a,b,c,d;
		a.read();b.read();c.read();d.read();
		printf("%.10lf\n",disss(a,b,c,d));
	}
	return 0;
}