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 ordered 10 of these. They never arrived. For the first time ever I received a message from Amazon saying "your package is lost". I just re-ordered. If they arrive I'll change my review...hopefully!!
Example Output: negative

Example Input: Well I received this product Monday, it’s friday and won’t turn on anymore. It was wonderful for 4 days, but like I didn’t spend 30-40 bucks on this for it to stop working. I’d like my money back, considering my old heating pad lasted 3 years.
Example Output: negative

Example Input: I use my mobile phone constantly throughout the day for work and need headphones to so I can have both hands free. These headphones are amazing, comfortable, and a great buy.
Example Output:
positive