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: These were NOT good.  They were hard and chewy and my kids wouldn't eat them.  That says a lot b/c my kids will normally eat anything!
Example Output: Negative

Example Input: I was quite skeptical about stevia at first, but tried it with another brand and thought there wasn't much difference in taste and I felt better about using a more natural product than the other artificial sweeteners out there. I then started looking at getting a bulk container and happened upon this product. I now have purchased this same product 4 times and am quite pleased. The product is a bit more concentrated and we are using less of the product in our drinks and cooking than other competitors.  The deliveries are always quick and we have not had any issues at all with the product or packaging.
Example Output: Positive

Example Input: Buyer Beware Please! This sweetener is not for everybody.  Maltitol is an alcohol sugar and can be undigestible in the body.  You will know a short time after consuming it if you are one of the unsuspecting many who cannot digest it by the extreme intestinal bloating and cramping and massive amounts of gas a person can experience. Nausea, diarrhea & headaches can also be experienced. I learned my lesson the hard way years ago when I fell in love with the sugar-free chocolates suzanne sommers used to sell.  I thought I'd found sugar-free chocolate nirvana at first taste but the bliss was short lived when the terrible side effects of maltitol kicked in.  The discomfort was unlike anything I had ever felt before.  I blew up like a balloon and had very painful abdominal cramping.  As the symptoms passed, this too was very unpleasant.  Though hard for me to believe a low calorie sweetener could be the culprit, all symptoms were gone when I stopped eating the chocolate. My hunch it had something to do with the maltitol were unfortunately confirmed for me about a year later when I purchased some delicious sugar-free popcorn at my local market.  The taste was amazing and while I was looking at the label wondering what could possibly make this yummy, new sugarfree treat taste so good, my heart sank when I followed the little asterisk next to sugarfree sweetener* down to the very bottom of the label and read "maltitol" in tiny little letters! Thank goodness I'd eaten only a little. I still ended up with all the same side-effects but for a much shorter duration. Some people can use maltitol to their heart's content but others, like me, can have a bad reaction to it. In case you're like me, ... it's not you ...it's the maltitol!
Example Output:
Negative