Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.

Ex Input:
my scanner hasn't worked since the day i took it out of the box, installed the software, and the green light is on but when i hit scan it does nothing! looks like it's a dud. lol.

Ex Output:
Negative


Ex Input:
While old and out of print, this book is a very good way to learn the basics of photography. You have to ignore most of the references to digital cameras as the technology has changed a lot.

Ex Output:
Positive


Ex Input:
The book covers several generations, so with each generation you have to re-learn all the characters. It is difficult to keep track of who's who when every time you get to know the cast, 200 years suddenly pass and we're in the middle of a new crisis. I didn't read the whole series because of this -- it was obnoxious.

Ex Output:

Negative