In this task, 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: it worked great for a few months and then it suddenly stopped charging. it repeatedly bumps against the dock but never begins charging. the battery is now dead and it doesnt work anymore.
Example Output: negative

Example Input: I love this collar! Very stylish and I like that it's easy to adjust the length. It's soft too so I feel like it's not irritating to kitty. I'd definitely buy another!
Example Output: positive

Example Input: I have been desperately looking for a dress in this style that is ACTUALLY a polyester spandex blend, as I have several dresses made of this combination that have lasted forever and wash really well. However, the dress I received is made of 95% RAYON and 5% spandex (this is stated on the tag). Based on my experience with previous dresses made of a rayon spandex combo, this tends to be an unpleasantly clingy material that doesn't drape well, tends to get holes, and pills after a few washes. I tried this dress on, and as with other dresses I've had made of this material, it clings in a very unflattering way. I will be returning this dress and I'm very disappointed. I wish Amazon would make an effort to verify product descriptions!!!
Example Output:
negative