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 purchased several herbs from Frontier which have been of good quality.  Thyme leaf is always one of the most difficult to purchase due to the likely chance of recieving more stem than leaf.  This thyme leaf purchase was of average to good quality.  I did have about 30-70%, stem to leaf cut in the package, so I was satified with the selection.  When I dry my own thyme leaf, I usually do about the same or a little less stem to leaf ratio for cooking use.  Stem of the thyme leaf are just as favorable as the leaf and can be used to cook with successfully.
Example Output: Positive

Example Input: Arm & Hammer's baking soda is aluminum free, they just don't write it on their packaging.  I wasn't sure so I called them and they said there is no aluminum in it, and they would have to state it if there was because people take the product internally.  This leads me to believe that there just isn't aluminum in baking soda.  And researching it showed me that there might have been in the past, but not anymore and not for a long time.  I resent that Bob's Red Mill writes "Aluminum Free" on their package and then charges a premium for their product.  It's also arsenic free, I hope.  If they label it "Arsenic Free" will we assume other brands aren't?  I don't like that kind of marketing.
Example Output: Negative

Example Input: We ordered the product...our dog loves them...but no one cares if its 100 degrees outside.  recieved in one big melted ball.  thought they would ship in dry ice.  If its summer or hot in your area dont order them !!
Example Output:
Negative