#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>
#include <limits.h>

FILE *in;
int n=0,num=0;
int scene,rx[30],ry[30],r[30],ref,hit;
double x,y,dx,dy;

double sqreq(double p, double q) {
  double wurz=p*p/4.0-q,res;
  if(wurz<0.0) return -1e30;
  res=(-p/2.0)-sqrt(wurz);
  return res;
}

double thehit(int k){
  double Dx,Dy,p,q,res;
  Dx=x-rx[k];
  Dy=y-ry[k];
  p=2*(Dx*dx+Dy*dy)/(dx*dx+dy*dy);
  q=(Dx*Dx+Dy*Dy-r[k]*r[k])/(dx*dx+dy*dy);
  res=sqreq(p,q);
  return res;
}

int clhit()
{
  int k=0,i;
  double tmin=1e38,t;
  for(i=1;i<=n;i++) {
    t=thehit(i);
    if( (t>1e-30) && (t<tmin) ) {
      tmin=thehit(i); k=i;
    }
  }
  return k;
} 

void new_ray()
{
  double t=thehit(hit),f,drx,dry;
  x+=t*dx;
  y+=t*dy;
  drx=x-rx[hit];
  dry=y-ry[hit];
  f=-2*(dx*drx+dy*dry)/(drx*drx+dry*dry);
  dx+=f*drx;
  dy+=f*dry;
}

int main(){
  int i;
  in=fopen("reflect.in","r");
  scene=0;
  while(fscanf(in,"%d ",&n)&&n){
    scene++;
    for (i=1;i<=n;i++){
      fscanf(in,"%d%d%d",&(rx[i]),&(ry[i]),&(r[i]));
    };
    printf("Scene %d\n",scene);
    fscanf(in,"%lf%lf%lf%lf",&x,&y,&dx,&dy);
    ref=0;
    while(ref<=10){
      if ( (hit=clhit())==0 ){
	printf("inf\n");
	ref=100;
      }else{
	if (ref==10) {
	  printf("...\n");
	  ref++;
	}else{
	  printf("%d ",hit);
	  new_ray();
	  ref++;
	}
      }
    }
    printf("\n");
  };
  return 0;

}