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

Example Input: why am I being asked to review a product I didn't purchase. Need to fix the system or allow me to delete the request.
Example Output: Negative

Example Input: this c.d. is off the hook. it blew the sets up down here. everybody need to quit hatin cuz you don't know what's up hot boys can flow and they be tearin up the charts
Example Output: Positive

Example Input: I learned a lot about the Eastern Front Luftwaffe. It is as much a study in the personalities as it is a history, strategy book.
Example Output:
Positive