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

Ex Input:
I ordered Alter Ego for men but got Alter Ego for woman. I followed the procedure given on the the web to complain and ask how to do the return, but did not get any answer.

Ex Output:
Negative

Ex Input:
I used this program for my science class. My students loved it! They learned some interesting facts, saw damage from earthquakes we talked about in class and never once did I hear that it was boring! Can't beat that!

Ex Output:
Positive

Ex Input:
This adaptor does not work with the dual USB iBook. It looks like a good product, but the plug doesn't fit.

Ex Output:
Negative