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

float inf = 1.0e10;
float eps = 0.001;
int nsph;

struct {
  float x, y, dx, dy;
} ray;

typedef struct {
  float x, y, r;
} SPHERE;

SPHERE sp[25];

float hit(SPHERE s) {
  float a, b, c, diskr, t1, t2;
  a = ray.dx*ray.dx + ray.dy*ray.dy;
  b = 2*(ray.dx*(ray.x-s.x)+ray.dy*(ray.y-s.y));
  c = (ray.x-s.x)*(ray.x-s.x)+(ray.y-s.y)*(ray.y-s.y)-s.r*s.r;
  diskr = b*b - 4*a*c;
  if (diskr > 0) {
    t1 = (-b - sqrt(diskr))/2/a;
    t2 = (-b + sqrt(diskr))/2/a;
    if (t1 > eps) return(t1);
    if (t2 > eps) return(t2);
  }
  return(inf);
}

void getsp(int *s, float *t) {
  int i;
  float tt;
  *t = inf;
  for (i=0; i<nsph; i++) {
    tt = hit(sp[i]);
    if (tt < *t) {*t = tt; *s = i;}
  }
  if (*t == 0) *t = inf;
}

void newray(int s, float t) {
  float x = ray.x + t*ray.dx;
  float y = ray.y + t*ray.dy;
  float w = atan(ray.dy/ray.dx) + atan((sp[s].y-y)/(sp[s].x-x));
  float dx = - cos(w)*ray.dx - sin(w)*ray.dy;
  float dy = +sin(w)*ray.dx - cos(w)*ray.dy;
  ray.x = x; ray.y = y;
  ray.dx = dx; ray.dy = dy;
}

int main() {
  FILE *file;
  float t = inf;
  int s, k, j;
  int num=1;
  file = fopen("reflect.in", "r");

  
  
  fscanf(file, "%d", &nsph);
  while (nsph != 0){
    printf("Scene %d\n", num++);
    for (k=0; k<nsph; k++)
      fscanf(file, "%f%f%f", &sp[k].x, &sp[k].y, &sp[k].r);
    fscanf(file, "%f%f%f%f", &ray.x, &ray.x, &ray.dx, &ray.dy); 
    getsp(&s, &t); j = 0;
    while ((t != inf)&&(j < 10)) {
      printf("%d ", s+1);
      newray(s, t);
      getsp(&s, &t); j++;
    }
    if (t == inf)
      printf("inf");
    else if (j == 10)
      printf("...");
    fscanf(file, "%d", &nsph);
    printf("\n\n");
  }
  exit(0);
}