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: Don't waste your money on these. Sound quality is good for the price, but the headband broke within a month. I am extremely careful with my electronics, and barely even used these things... maybe a dozen or so times before the headband broke. Too bad, I thought I finally found a quality pair of BT headphones at a decent price.
Example Output: negative

Example Input: Really cheap thin glass, it even feels ridiculously fragile when you hold it. The first one I used fell over when I took it out of the box and shattered on the spot (about 2 inch fall). No high hopes for the remaining ones
Example Output:
negative