#include<cstdio>
#include<cmath>
using namespace std;
const long double PI=acosl(-1);
int T,ds,dt,ans;long double X[9],Y[9],Alpha;bool flg;
inline void slv(){
	long double d=sqrtl((X[1]-X[3])*(X[1]-X[3])+(Y[1]-Y[3])*(Y[1]-Y[3]))/2,k=sqrtl(1-d*d)/d;
	X[2]=(X[1]+X[3])/2+(Y[3]-Y[1])/2*k;Y[2]=(Y[1]+Y[3])/2+(X[1]-X[3])/2*k;
}
int main(){
	for(scanf("%d",&T);T--;flg=0){
		scanf("%d%d",&ds,&dt);
		if(ds==dt){printf("0\n1 0\n");continue;}
		dt=(dt+360-ds)%360;
		if(dt>180) dt=360-dt,flg=1;
		Alpha=dt*PI/180;
		if(dt<=90) ans=2,X[0]=1,Y[0]=0,X[2]=cosl(Alpha),Y[2]=sinl(Alpha),X[1]=X[2]+1,Y[1]=Y[2];
		else if(dt<=131) ans=3,X[0]=1,Y[0]=0,X[1]=1,Y[1]=1,X[3]=cosl(Alpha),Y[3]=sinl(Alpha),slv();
		else ans=4,X[0]=1,Y[0]=0,X[1]=1,Y[1]=1,X[4]=cosl(Alpha),Y[4]=sinl(Alpha),X[3]=X[4]+Y[4],Y[3]=Y[4]-X[4],slv();
		if(flg) for(int i=0;i<=ans;++i) Y[i]*=-1;
		printf("%d\n",ans);
		for(int i=0;i<=ans;++i)
			Alpha=ds*PI/180,printf("%.9Lf %.9Lf\n",X[i]*cosl(Alpha)-Y[i]*sinl(Alpha),X[i]*sinl(Alpha)+Y[i]*cosl(Alpha));
	}
	return 0;
}