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 have dogs who are 85 pounds. They chewed the bottle toy in less than 10 minutes; trashed it. I have not tried this with a little dog.
Example Output: Negative

Example Input: I have recently been on a low carb diet, as I find that I can no longer tolerate even natural sugars like agave, honey, and dates. These raise the blood sugar which spikes the insulin, a hormone whose message is "store fat!" Insulin also causes the kidneys to retain water and therefore I would bloat from a high carb diet.  My dilemma is that I love sweets--and now it is not a problem, thanks to products like stevia, a natural plant that has safely been used in parts of the world as a sweetener for hundreds of years. It has no calories and no impact on the blood sugar (although for some people there might be a bit, as the brain is tricked into thinking it is getting sugar). Stevia used to be legal in the USA only as a cosmetic product because of politics: companies that made low calorie sweeteners such as aspartame did not want competition. Yet, aspartame gave me headaches and even sometimes symptoms of multiple sclerosis. So I would use stevia at times, but the aftertaste was bad--and to be honest, I wasn't too crazy about the "during taste" either.  Then I tried NuNaturals. This product is awesome and like no other stevia I have tried. It is not only delicious but also has no aftertaste (unless you put in way too much--a common mistake by people new to this). It comes in tablets and in powdered form (in a bottle or handy packets with individual servings). It also comes in alcohol-free liquid form and even in vanilla flavor. Unlike aspartame (which becomes even more toxic when heated) stevia can be used in baking. NuNaturals has a stevia baking blend just for that. (Since I am a raw fooder, I can't tell you how it tastes, but I am sure it is good, judging by their other products.)  Thanks to these great products, I can do a low carb raw diet but not be deprived of my sweets!
Example Output: Positive

Example Input: My guess is the other flavors of Switch taste better. I thought this had an overkill berry flavor and aftertaste. It probably would have been okay if it were cherry flavored. That being said, I'm not sure I would let my dislike of the flavor dissuade you from trying it. Could just be a personal preference.
Example Output:
Negative