Given the task definition and input, reply with output. 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.

After years of drinking Red Bull, Rockstar, Monster and some others, I have found the holy grail of energy drinks. It kicks in within 2-3 minutes and it lasts an entire work day. After seven hours or so, you gradually come down. There is no anxiety or disphoria when it wears off. You just get very sleepy when you finally rest. Redline Power Rush is the very best product on the market. If it were illegal I would buy it on the black market. 'Nuff said.
Positive