You will be given a definition of a task first, then some input of the task.
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.

CHEAP! It hasn't even been three months since I bought it and it just stopped working! I clean it regularly and change the filter every week. I want either a replacement or a half refund. About to call amazon and see what they can do. This is so irritating!!!!!
Output:
negative