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: The basic problem with this product is that unless you load a VERY small amount of coffee in the filter, the filter clogs.  This causes the coffee ground and hot water to back up through the hole in the top and cause a mess.  My son and I spent a few hours experimenting with different ways to prevent this but we have admitted defeat.  I suspected the filter but I used filters which work perfectly fine in my EZ Cup still result in a mess on my kitchen counter. Even worse, coffee grounds in my coffee!  However, if you like your coffee very weak, this will work well for you.  I hope they can fix the design issues.  Until then, I will stick with my EZ Cup.
Example Output: Negative

Example Input: Zen brews up to an golden amber liquor. The aroma is sweet spearmint. The blending of this tea is excellent--spearmint could be overpowering but they use just the right amount of it. Slightly sweet spearmint is the primary flavor, then you taste a hint of lemon. The green tea provides an herbal base for these two flavors that makes the intial impression of zesty spearmint and lemon modulate into a substantial potion. Very nice and satisfying with a clean spearmint aftertaste.  Remember that this tea does have caffeine--however, it does not say how much on the box. A good estimate might be 30 mg--compared to 90mg for the average cup of coffee. Make sure you time how long you brew this tea because if you brew too long it becomes bitter. Four minutes is ample.
Example Output: Positive

Example Input: I've always given my dog what I thought was high quality dog food since she was a puppy.  After the pet food issues of a few years ago I switched to only organic dog food for her.  Since she is only 10 lbs the price difference isn't too bad.  I am a free feeder which isn't ideal but means my dog basically has access to food any time she wants it.  Because of this she only gets really excited when "people" food is offered to her.  Well when I open this bag she comes over and eats asap.  Good enough for me!
Example Output:
Positive