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: My dog will do anything for these treats. Buying a five pound bag lasts about a year and they are dry so they are easy to put in your pocket and they last forever.
Example Output: Positive

Example Input: I have tried different brands of hot cocoa from dark to milk and the Grove Square milk chocolate k-cups have by far been the best.  They're big critics in my family and they have given two thumbs up.  I would recommend anyone who enjoys hot cocoa to purchase this brand.
Example Output: Positive

Example Input: I purchased this nylabone for my 4 month old teething puppy. I figured she'd enjoy a tasty chew toy. She's quite the chewer so I was thinking the bone would last a day or two at best. However that was wishful thinking! In less than 20 minutes, she had consumed all of it but the bulky end (which we threw away). We couldn't believe how quickly she chewed it up! Definitely not worth the $8.
Example Output:
Negative