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: I really like these things for scrubbing water stains on sinks and toilets. They do wear down fairly quickly so having four around is not a bad idea and is defiantly cheaper then ordering them one by one.
Example Output: positive

Example Input: Buying these is like playing Russian roulette. If you get a good one, like a friend of mine's, they are well worth the price. But the one I received had parts that did not lock together and the rotor wobbled. I returned it.
Example Output: negative

Example Input: I like these foam inserts. I have a different filter than what these were designed for, but not a problem. These are easy to cut and fit great. They cost much less than the ones sold for my filter. So I'm pleased.
Example Output:
positive