In this task, You are given a review of Amazon's food products. Your task is to divide them into two classes: negative or positive, depending on the content of the review.

Example Input: I was excited to receive this wristlet / wallet & upon opening found it had some type of glue stuck to the exterior & one of the zippers gets hung up and makes it difficult to zip. I am returning & do not recommend this item for purchase.
Example Output: negative

Example Input: Every can in the case I received was dented. Do they pull out the dented cans they can't sell in the store and send them to Amazon customers? Just saying. I will return the next dented case I receive! We don't eat from dented cans so I don't want my dog to eat out of them either!
Example Output: negative

Example Input: My tracking number says my book was delivered yesterday... I still don't have it. My class started two weeks ago, and now I'm going to miss assignments because my book is no where to be found. Horrible service.
Example Output:
negative