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 enjoy this tea because it's not to sweet and it's easy to use. I carry it and my mug with me and just add hot or cold water, depending upon my mood. I find that it gives me just the right kind of energy and it can even hold my hunger between meals. A real great thing because I watch my calories. And of course, green tea is full of antioxidants.
Example Output: Positive

Example Input: I recieved a Keurig K-Cup Brewer for Christmas with sample cups of coffee and tea but no cocoa so I tried this brand and I like them but I haven't tried other brands yet to compare with. I would buy these again until I find one I like better.
Example Output: Positive

Example Input: These K-cups are either extremely old or they're not authentic Green Mountain K-cups. The coffee is weak and has a bad after-taste. Both my spouse and I have noticed this independently of each other. I tried to contact the seller to ask about this but couldn't figure out who it was.
Example Output:
Negative