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: Unfortunately they didn’t work for me at all for they doesn’t work with soft tissue. My skin tissue is too soft and it won’t stay in place. So be careful unfortunately it won’t work for everyone. The firmer your skin is the better it may work.
Example Output: negative

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: I have owned this product for 10 days, although I knew it was going to be a cheap product based on the price, I thought it would last longer than it did. 10 days is not worth the 7.99. will not purchase again. lesson learned!
Example Output:
negative