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: This is easy to use and comfortable. The heat doesn’t last that long and the scented smell is so terrible that I can’t even keep the eye mask on that long.
Example Output: negative

Example Input: A beautiful set of international power converters for travel. It is equipped with international adapters for different countries. I am very satisfied with this product and will buy gifts for travel friends again.
Example Output: positive

Example Input: I placed and order and paid to get it next day but they didn’t send it until a few days later, I contact them and they told me they were going to refund it, but at the end they ended up charging more than the original price and the shipping for next day, even when they didn’t send it until a few days later, plus the carrier took more than a day to deliver it too.
Example Output:
negative