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 purchased this item to use for my sons prom send off, the only balloons that were able to be used were the latex ones, no foil balloons could be used, also the discription shows a 2018, I was sent a 2019, which means the day of prom last minute I had to go and purchase the correct numbers which cost me an extra 40 dollars... I'm so disappointed..
Example Output: negative

Example Input: Really good construction, not the usually cheap plastic feel. I love the multiple colors on each truck. The return mechanism is really nice and fun. It's a must buy for every child!
Example Output: positive

Example Input: Right out of the box it was fully charged and ready to go. I decided to test it out by powering my Raspberry Pi while I did updates and some other tinkering. I can’t remember exactly when I started but the Pi was powered for well over 12 hours before the battery bank lost juice. Charging the bank via solar is slow but can be done if the need arose. Even charging via an outlet took a bit of time but once it’s charged you’re good to go. I wouldn’t hesitate using this to power my Raspberry Pi for portable ham radio digital mode operation. I may buy a second one to power a small screen and as a backup. Directions took a little bit to get through but fairly straightforward after that. I don’t plan on testing how water resistant it is and it doesn’t feel like something I’d want to drop as the outer shell is only plastic.
Example Output:
positive