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 purchased these to replace the straws that I use to get at Starbucks every morning. Starbucks no longer gives straws, so I wanted a replacement that is environmentally concise. These are great. They fit perfectly through the opening in the new Starbucks lids and held up all day.
Example Output: positive

Example Input: The set is beautiful and sturdy. Very comfortable seating and the blue color is pretty. There is a lot of nuts and screws involved in the assembly. We used a power tool to assemble. We had no trouble putting the pieces together. It took us two hours to get it altogether, when done it will have been all worth it.
Example Output: positive

Example Input: I rated this product 1 star because after an hour of shaking half the markers they did finally work long enough to write what I needed. The pink one busted during shaking it, the ball flew out and pink went every where. I didn't even use the other half of the markers because of the amount of time it took to even make them write. Will never buy the again.
Example Output:
negative