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

Example Input: This set of assorted short tracks is hard to avoid if you want to create a track layout of even an intermidiate size. The male-male and female-female pieces will provide a dramatic increase in the number of layouts possible as you can now overcome the problem of curves returning to the starting position.This is a must-have for any Brio enthusiast.
Example Output: Positive

Example Input: this book rocks, people! however, i got reali confused withnyala's character. what's up with her aniway? split personality?aniway, i reali loved rashel and quinn though they were always at each other's throats!! enjoy this book! p.s : if u're reading these reviews to decide whether it's worth ur money, i tell ya, get it QUICK before it's all gone!
Example Output: Positive

Example Input: This is the first book by Alastair Reynolds I have read. I must say I was disappointed. The idea behind the book is interesting. But Reynolds' writing is pedestrian at best. The pacing is terrible. The characterizations are thin. The book drags for hundreds of pages, then falls apart in the last 50. It seems like the editor got nervous at the length and told AR to wrap it up quick-smart.I would read other books by AR if they were given to me, but I won't be buying any others.
Example Output:
Negative