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 bought two of these alarm clocks for my sons' bedrooms. Like other reviews, these clocks do not keep accurate time in either room. The only purpose they serve at this point is to charge their cell phones overnight. This product is a waste of money and I highly discourage consumers to purchase it.
Example Output: negative

Example Input: Do not replace your Bose headphones. Get these replacement pieces, throw the stock ones away. These will make your headphones sound the way you hoped they’d sound when you got them. I went for a 20 mile bike ride with them stock and when I got home I checked the mail. My replacement (nibs?) were delivered. I put the new ones on and threw out the old ones. The sound is incredible. Get them. Even if you aren’t sick of the stock nibs. Get these. You won’t be sorry.
Example Output: positive

Example Input: This little light exceeded expectations. I'd been using an older light that ran on two AAA batteries. My wife gave me the Cygolite headlight as a gift, and the rechargeability appealed to me, so I ordered this so I could have all rechargeable lighting. It's pretty hard to be dazzled by red light because of the way the eye works, but this sure as hell dazzled me when I first turned it on, facing my eyes. WOW. There are lots of modes to cycle through, from short and medium flashes to dim up, dim down to solid ON. It takes a minute to get used to holding down the button to turn it off, but once you've got that, the light "remembers" what mode it was in when you turned it off, and comes back to that mode when you turn it back on, which to me is exactly the right behavior. Love this little light!
Example Output:
positive