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 have older mats that have a ribbed surface and work great. These have small stiff points and actually hurt to lean on or kneel on. I can imagine that they hurt my cats paws ad that is why they tend to jump over them when exiting the littler box.
Example Output: Negative

Example Input: Such an easy way to buy calorie controlled snacks.  The arrived quickly.  So easy to take to work or when you need just an easy snack.
Example Output: Positive

Example Input: i used extra yeast and a little more water and it came out very light with a heard crust, which i like. i will order it again. not much of a potato taste but good bread
Example Output:
Positive