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: flexible microwave lids in graduated sizes that fit inside one another through the central button handle - work well, excellent price. Anticipate they will be durable.
Example Output: positive

Example Input: I thought the impeller was broken so I purchased a new one and unfortunately learned that it is the filter itself that is no longer able to pump water. I bought this a month ago. My turtles are not happy.
Example Output: negative

Example Input: ideal for tenderfoots, esp the notes on precious stones and fundamental oils. I would have given it a five, however I couldn't discover any data in the book on nourishment/diet which is imagined at the extremely top of the book!
Example Output:
positive