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: Unfortunately they didn't work for me at all for they doesn't work with soft tissue. My skin tissue is too soft and it won't stay in place. So be careful unfortunately it won't work for everyone. The firmer your skin is the better it may work.
Example Output: negative

Example Input: The connection with my iPhone was very smooth and easy. There is no lag and the sound quality is superb. It last days with full charge. Looks very sophisticated.
Example Output: positive

Example Input: I had problem with the 2 screen protectors, any of them paste well on the screen. Very disappointing because I also bought the complete screen protection and I hope not happening the same thing...
Example Output:
negative