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: Would definitely not recommend!!! Although the actual material that the bag is made of seems to be of good quality, the zippers are cheaply made. The zippers on my bag just won’t stay closed. It has split open numerous times, spilling all of its contents. Imagine the frustration having to pick everything up with 1 hand as you hold an infant with the other arm.
Example Output: negative

Example Input: Very frustrated. Opened upon receiving so that it can expand. It’s been 6 hours and still hard as a rock and curled up. Wondering how long it’s going to take to expand to isn’t normal shape.
Example Output: negative

Example Input: First and foremost, this product does exactly what it promises, as it's a carafe and it's a presentable, table-ready serving device. Its top is well-made and seems like it will be sturdy and sustainable when it comes to preserving temperatures. It also looks cool, as I like the mix of black, silver and clear coloring. There are bigger carafes on the market, but this is one to consider purchasing for its economical value.
Example Output:
positive