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: The bands work great and I like the different colors which make the Fitbit more versatile. I wear my Fitbit all the time so I am able to change the band to coordinate with what I am wearing. Great price and made very well. I have had mine for about 2 months now and have had no problems. Received the item in a timely manner!!
Example Output: positive

Example Input: My 3 year old loves this piano! It is so fun and the microphone is a great bonus! Lots of musical options to use when playing with this adorable piano!
Example Output: positive

Example Input: I purchased this item for my son's 8th bday. I'm very disappointed with it. First the portion that secures the phone is not flushed properly at the base plus the piece at the top that secures the phone in place will not snap to secure it. Hence he has to hold the face of it just to make sure the phone doesn't fall out.
Example Output:
negative