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: I've been drinking these for years. When they changed the formula, it ADDED SUGAR, tastes WORSE, AND often LEAKS. Totally unacceptable, especially for how expensive these are. I've called Gevalia numerous times to try and explain why then need to go back. Seems EVERYONE liked the old formula better. And it was healthier for you. FAIL!
Example Output: negative

Example Input: Bought two of these mattresses for a bunk bed and they are terrible. You can see where the springs are and there is little to nothing separating them from the cover. Description lists 2" of total foam and there can't be more than a half inch. You get what you pay for but the description could atleast be correct.
Example Output: negative

Example Input: Ordered two cartridges, one has a faulty circuit which looks melted while the other arrived with the ink leaking staining me and my desk while opening the package.
Example Output:
negative