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 bought these on August 22nd and installed them right away. It’s been a little over a month and around 5,000 miles and they are completely warped. Very disappointed with the overall quality of this product.
Example Output: negative

Example Input: Very frustrated with this product. It had high reviews which lead me to purchase this glue gun. Within the first 2 minutes of using it the gun clogged up. So I exchange it for a new one thinking maybe I had a defective gun. NOPE! The 2nd gun was even worse. Clogged up almost immediately. I followed the instructions, so I know it wasn’t anything I was doing wrong. If they could fix this issue on the glue gun I would say that this product is amazing, but as it is now it doesn’t do what it supposed to.
Example Output: negative

Example Input: This bag is excellent. I needed a black one for daily use, and it looks great. Proper size, good quality material, and it looks expensive even though it is economical.
Example Output:
positive