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: Arrived promptly. I received it today and began taking immediately. It contains so many vitamins, such as A, C, D3, E, B6, Folic acid and of course biotin, etc. I believe in this product and hope it will deliver promising results.
Example Output: positive

Example Input: Peice of crap dont work cant pick up nothing here so when I called company to send it back the company refused to reimburse me so thank God I had Amazon insurance
Example Output: negative

Example Input: Have tried a bunch of other live traps. This is my favorite. It is very hardy, the mice can't chew their way out of it, which some have done with the cheaper traps. Plenty of ventilation so the mice don't fog up the inside of the trap and overheat or run out of air.
Example Output:
positive