#include<bits/stdc++.h>
#define double long double
using namespace std;

int t,ds,dt;
double pi=acos(-1);

int main(){
	ios::sync_with_stdio(false);
    ios_base::sync_with_stdio(false);
    cin.tie(0);cout.tie(0);
	cin>>t;
	while(t--){
		cin>>ds>>dt;
		int flag=0;
		if (ds<dt) dt-=360;
		if (ds-dt>180){
			swap(ds,dt);
			dt-=360;
			flag=1;
		}
		if (ds-dt==0){
			printf("0\n");
			printf("%.10Lf %.10Lf\n",cos(pi*ds/180),sin(pi*ds/180));
		}
		else if (ds-dt<=90){
			if (flag) swap(ds,dt);
			printf("2\n");
			printf("%.10Lf %.10Lf\n",cos(pi*ds/180),sin(pi*ds/180));
			printf("%.10Lf %.10Lf\n",cos(pi*ds/180)+cos(pi*dt/180),sin(pi*ds/180)+sin(pi*dt/180));
			printf("%.10Lf %.10Lf\n",cos(pi*dt/180),sin(pi*dt/180));
		}
		else if (ds-dt<=131){
			printf("3\n");
			double temp1,temp2,temp3,jiao;
			temp1=sqrt(2-2*cos((ds-dt)*pi/180));
			temp2=temp1+1;
			temp3=(2-temp2)/2;
			double temp4=(1+temp1*temp1-temp2)/2/temp1;
			jiao=(360-(540-acos(temp3)/pi*180*2-(ds-dt)))*pi/360;
			double jiao1=acos(temp4);
			double jiao2=acos(temp3);
			//printf("%.10lf\n%.10lf\n%.10lf\n",(jiao1+jiao2)/pi*180,jiao1,jiao2);
			if (flag) {
				swap(ds,dt);
				jiao=-jiao;	
			}
			//cout<<jiao<<' '<<pi*ds/180-jiao+2*pi<<' '<<pi*dt/180+jiao<<'\n';
			printf("%.10Lf %.10Lf\n",cos(pi*ds/180),sin(pi*ds/180));
			printf("%.10Lf %.10Lf\n",cos(pi*ds/180)+cos(pi*ds/180-jiao),sin(pi*ds/180)+sin(pi*ds/180-jiao));
			printf("%.10Lf %.10Lf\n",cos(pi*dt/180)+cos(pi*dt/180+jiao),sin(pi*dt/180)+sin(pi*dt/180+jiao));
			printf("%.10Lf %.10Lf\n",cos(pi*dt/180),sin(pi*dt/180));
		}
		else {
			printf("4\n");
			int mid=(ds+dt)/2;
			printf("%.10Lf %.10Lf\n",cos(pi*ds/180),sin(pi*ds/180));
			printf("%.10Lf %.10Lf\n",cos(pi*ds/180)+cos(pi*mid/180),sin(pi*ds/180)+sin(pi*mid/180));
			printf("%.10Lf %.10Lf\n",cos(pi*mid/180),sin(pi*mid/180));
			printf("%.10Lf %.10Lf\n",cos(pi*dt/180)+cos(pi*mid/180),sin(pi*dt/180)+sin(pi*mid/180));
			printf("%.10Lf %.10Lf\n",cos(pi*dt/180),sin(pi*dt/180));
		}
	}
}