#include <stdio.h>
#include <math.h>

struct sfere{
 int x,y,r;
}sf[50];
int touched[50],to=0;
double x0,y0,vx,vy,t ,tmin,a,b,c;

void main()
{
	 int n ,k, prima,scene=0;
	 FILE*f;
	 char s[100];
	 f=fopen("reflect.in","r");
	 
	 while(1)
	 {
	 	fgets(s,100,f);
		sscanf(s,"%d",&n);
		if(n==0)break;
		scene++;
		printf("Scene %d\n",scene);
		for(k=0;k<n;k++) 
		{
			fgets(s,100,f);
		    sscanf(s,"%d %d %d",&sf[k].x,&sf[k].y,&sf[k].r);
		}
		fgets(s,100,f);
		sscanf(s,"%lf %lf %lf %lf",&x0,&y0,&vx,&vy);
		to=0;
		iniz:tmin=1000000.0;
		
		for(k=0;k<n;k++)
		{
			a=vx*vx+vy*vy;
			b=(x0*vx*2-vx*sf[k].x*2+y0*vy*2-vy*sf[k].y*2);
			c=x0*x0+sf[k].x*sf[k].x+y0*y0+sf[k].y*sf[k].y-
				x0*sf[k].x*2-y0*sf[k].y*2-sf[k].r*sf[k].r;
			if(b*b>4.0*a*c) t=(-b-sqrt(b*b-4.0*a*c))/(2.0*a);
			else t=1000000.0;
			if(t>0.01 && t<tmin) {tmin=t; prima=k;}
		/*	printf(">> %d %.3f %.3f\n",k,t,tmin);*/
		}
		if(tmin==1000000.0) 
		{
		
			for(k=0;k<to;k++) printf("%d ",touched[k]);
			printf("inf\n\n");
           
		 	continue;
		}
		x0+=tmin*vx;
		y0+=tmin*vy;
		touched[to]=prima+1;
		to++;
		if(to>10)
		{
		
			for(k=0;k<to-1;k++) printf("%d ",touched[k]);
			printf("...\n\n");
			
		 	continue;
		}
		{
			double teta,alfa,beta;
			teta=atan2(y0-sf[prima].y,x0-sf[prima].x);
			alfa=atan2(-vy,-vx);
			beta=2.0*teta-alfa;
			vx=cos(beta);
			vy=sin(beta);
		}
		goto iniz;
	 }
}