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.

Q: I slouch at work sitting at a desk all day. Was trying to find a good solution to help alleviate the slouching and back pain. This posture corrector has definitely helped! I am sitting straighter and the pain has lessened.This posture corrector has given me strong support for my back, without restricting my movements.

A: positive
****
Q: I haven't used these products yet, the raincoat used before was very heavy. It's very inconvenient to put on. So I tried this raincoat, it feels great to put on. There is no sense of obstructing action. When I opened the package, I found a variety of raincoats in different colors, each of us can choose the color we like. I think we can take it with us on the field trip. Because it was raining hard days ago, it was I who carried a raincoat like this I won't get caught in the rain, I don't even feel it. It's a great feeling. A raincoat is long enough, it won't get your knees wet. That's not what other raincoats can do. So I suggest you take a raincoat like this. It won't take up your space and it will bring you convenience.

A: positive
****
Q: I was happy to get these extractors at such an inexpensive price. They fit my 890 roomba just fine. They picked up great at first and I was quite happy. However, now 1 month has passed the rubber tread (aka grippers) has worn completely smooth on my black roller. For some reason, the gray one still looks fine. I am very disappointed and have ordered a new set directly from iRobot Roomba parts.

A:
negative
****