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: What I liked the most about using these Gelatin Vitamins was how quickly my nails started to grow and the strength of them. I always have had thin and brittle nails but now they are finally starting to harden. I also started noticing how much my skin has cleared up on face!
Example Output: positive

Example Input: I bought this in a size to fit my thumb and it fits well, stays put, looks good, and spinning the outside ring has become addictive. I like this ring a lot.
Example Output: positive

Example Input: All these adapter are junk and unusable. They create hissing and popping. Horrible quality. The only good thing is when I asked for a refund and they wasted in refunding my money and I did not need to return them. They all went in the trash.
Example Output:
negative