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

Example Input: I think beyond the fact that Hazlitt produces a succinct and well-argued explanation for why free markets are the best arrangements in economic relationships, what is really wonderful is reading the screeds of those readers that he pisses off! Read the rabid ranting temper tantrum of the one reader who amazingly was accepted to the University of Chicago and you can see how ideas that actually support free thought and productive profitable endeavors drive lunatics like this crazy - its awesome!! This dork probably marches against the WTO.
Example Output: Positive

Example Input: I had almost all of the Jean Auel's books and needed this one to complete my collection. It turned out to be a book club size and I traded it to a friend for the full size version.
Example Output: Positive

Example Input: I spent over 2 1/2 hrs. (after 1 hr. myself) on the phone with HP trying to install this printer. It never would work right. The HP tech said there is a problem in the software program of this printer. This HP DESKJET 940C is everyone's worst installation nightmare!
Example Output:
Negative