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: Being a contractor for 25 years I know how to calibrate a stud sensor... this is the biggest piece of junk I’ve ever bought!!! I wished I could get my money back!!!
Example Output: negative

Example Input: I never wanted to be a dog parent that needed one of these, but here I am. I have a year old puppy that will not listen when it comes to eating things he's not supposed to outside. It's super easy to use and I love that there are different settings. I mostly use the vibrate but when I do need to use shock I have to use at least 80 for my dog to even notice it. My use of the collar is to have my dog drop whatever is in his mouth from a distance so a lower setting might work for your dog. There's a charge port to put the collar and remote on which is awesome. The collar is also super long but you can trim it to fit.
Example Output: positive

Example Input: This Swing is so easy to set up and move that even Nana can do it. Gemma Loves to swing indoors or outside Stops the grumpy baby and brings back my angel.
Example Output:
positive