class ScentedPoint extends Point {
    int scent;
    ScentedPoint(int x, int y, int scent) {
      super(x, y);
      this.scent = scent;
    }
    public boolean equals(Object o) {
      if (o instanceof ScentedPoint) {
        if (!o.getClass().isAssignableFrom(getClass())) {
          //let the subclass decide if we are equal
          return o.equals(this);
        }
        ScentedPoint cp = (ScentedPoint)o;
        return scent == cp.scent && super.equals(o);
      }
      return false;
    }

    public int hashCode() {
      return x*31 + y*29 + scent*41;
    }
    public String toString() {
        return ("ScentedPoint: x = " + x + ", y = " + y + ", scent = " + scent);
    }
}