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]: When the ache/pain in my upper back won't stop, I always turn to this product. It takes away the pain almost immediately. It is adjustable and comfortable to wear. I love it!!
[A]: positive

[Q]: The slots are a bit small for my liking but this case is amazing and my 3 and 7 year old fight over who gets to use it. Guess I'll have to get another one.
[A]: positive

[Q]: I have ordered toner for both my laser jet printer and my ink jet printer and am very satisfied with the quality of the product, the unbeatable price and the quick delivery! Thank you
[A]:
positive