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: So bad. I feel like the dishes would’ve been more clean if I used nothing. Dishes came out dirty and filmy every time. Couldn’t even tell if I ran the dishwasher or not and was having to rewash every dish.
Example Output: negative

Example Input: Just opened my plastic package because hard to see if center pin was copper as pictured in ad.. sadly it was not. By the way, do not tear open your package because it states on the package,"No returns if bag is open" what a waste, I should have just driven to an autoparts store.
Example Output: negative

Example Input: I would highly recommend to not buy this mattress. It starts compressing after a while and causes back pain while sitting. Me and my roommate both are regretting having bought this mattress. On top of that customer service is horrible too, they will ask for picture proof of the compression which is practically impossible so the warranty is fake too.
Example Output:
negative