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 received this chair today and definitely regret buying it. The off gasses made me and my son both sick with difficulty breathing and sore throats. There was no odor however some chemicals do not have a smell. There is formaldehyde per the package insert. Wish I had known this before buying. The reviews seemed to convince me that it was also pretty comfy but sadly I would not want to sit in this chair for More than a few minutes. It’s very firm and not the chair I was hoping for. It’s currently outside off gassing and will most likely keep it because I’m too lazy to pack it back up. It will probably grace the corner in spare room to torment any guests we have in the future.
Example Output: negative

Example Input: I wear Vionic sandals exclusively because of foot issues but this is my first pair of Bella II style flip flops..very pleased with dressier appearance. The comfort level feels the same as other styles of Vionic flip flops. I bought the black patent and will also order the pewter in this style. Very happy with product and prompt delivery.
Example Output:
positive