#include <stdio.h>
#include <stdlib.h>
#include <math.h>
FILE *fp;


double CX[30],CY[30],R[30];
double x,y,dx,dy,cx,cy;
int NumS,Hits,Scene=1;
double hitx,hity;
int LastHit; /* per non rifare il controllo sulla stessa */

/* non fare con l'ultima toccata */

/* prende il t con la sfera i. 0 se non si toccano */
double IntSp(int i) {
  double cx,cy,a,b,t1,t2,r;
  double delta;
  
  cx = CX[i]; cy = CY[i]; r = R[i];
  
  a = x-cx;
  b = y-cy;
  
  delta = (a*dx + b*dy)*(a*dx + b*dy) - (dx*dx + dy*dy)*(a*a + b*b - r*r);
  
  if (delta < 0)
    return 0;

  t1 = (-(a*dx + b*dy) + sqrt(delta)) / (dx*dx + dy*dy);
  t2 = (-(a*dx + b*dy) - sqrt(delta)) / (dx*dx + dy*dy);

/*  printf("trovo t = %f %f\n",t1,t2);  */

  if (t1 < 0 && t2 < 0)
    return 0;
	
  if (t1 < 0)
    return t2;
	
  if (t2 < 0)
    return t1;

  if (t1 < t2)
    return t1;
  else
    return t2;
}

void NewD() {
	double cpx,cpy,dpx,dpy,crx,cry,drx,dry;
	double px,py,det,a1,a2;
	
	cpx=cx;
	cpy=cy;
	dpx=hitx-cx;	
	dpy=hity-cy;	
	
	crx=x;
	cry=y;
	drx=-dpy;
	dry=dpx;
	
	det=dpx*dry-dpy*drx;
	a1=cpy*dpx-cpx*dpy;
	a2=cry*drx-crx*dry;
	px=(drx*a1-dpx*a2)/det;
	py=(dry*a1-dpy*a2)/det;

	dx=(2*px-x)-hitx;
	dy=(2*py-y)-hity;
}



/* -1 se non c'e' */
int Inter(void) {
  int i,mini;
  
  double min = 10E9;
  for (i=0; i < NumS; i++)
    if (i != LastHit)
 	 	if (IntSp(i) > 0 && IntSp(i) < min ) {
		  min = IntSp(i);
		  mini = i;
		}

  if (min == 10E9)
    return -1;

  hitx = x+dx*min;
  hity = y+dy*min;

  cx = CX[mini];
  cy = CY[mini];

  NewD();

  x = hitx;
  y = hity;

  LastHit = mini;

/*  printf("HIT in %f %f t = %f retta = %.2f %.2f %.2f %.2f\n",hitx,hity,min,x,y,dx,dy); */

  return mini;
}


int main(void) {
	fp=fopen("reflect.in","r");

	while (fscanf(fp,"%d",&NumS),NumS) {
	 	int i;
	  
	 	for (i=0; i < NumS; i++)
	 	fscanf(fp,"%lf %lf %lf",&CX[i],&CY[i],&R[i]);

     	fscanf(fp,"%lf %lf %lf %lf",&x,&y,&dx,&dy);
		
		printf("Scene %d\n",Scene++);

		LastHit = -1;

		/* okkio all'inf se sono esattamente dieci */

		for (Hits =0; Hits < 10; Hits++) {
			int s = Inter();
			
			if (s == -1) {
			 	puts("inf");
				puts("");
				break;	
			}  

			printf("%d ",s+1);

		}

		if (Hits >= 10) {
		  if (Inter() == -1)
		 	puts("inf");
		  else
		 	puts("...");
		  
		  puts("");
		}
	}
	
	return 0;
}