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: Very impressed! Was nervous but it looks way more expensive then it really is. The engraving were perfec. It's an awesome knife, my boyfriend loves it! Fast shipping too!
Example Output: positive

Example Input: My husband bought this for me. I have to say it is amazing!! The toy attachments all come individually wrapped. There is a very nice assortment of toys. None of them have a strange odor, which is very nice. They are body safe which is a must! It is not very loud, which I expected it to be. It is easy to use, and works very well. The adapter on the first one that controls turning it on and off and your speed did not work. We contacted customer service and they were GREAT and fast! They sent us a whole new machine and it works perfectly!!
Example Output: positive

Example Input: I started having back issues after bowling at my nephews birthday party. I could barely stand, let alone, walk. I bought this unit and it was delivered the same day. I don't feel 100% better yet but I do feel some relief after only the first use.
Example Output:
positive