Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.

Example Input: I was very excited to buy this scanner and was pleased with its size and weight. However, if you have a Vista operating system, like I do, IT WILL NOT WORK! The company told me that they stopped selling this product over a year ago and there are no driver updates available for this product. If you have an older computer and an older operating system this product might work for you. But as for me it was a waste of money!
Example Output: Negative

Example Input: I purchased the Intex airbed to replace an Aerobed that our cats "loved" too much during a guest visit. Comfort wise, the Intex wins hands down-supportive yet comfortable as well. Convenience wise, it inflates a little slower than our old Aerobed (albeit, there is more to inflate) yet it takes up less room when rolled and stored in the sack that comes with it. The only reason I didn't give it 5 stars is because it is VERY high, so a restless sleeper can fall off pretty easily.
Example Output: Positive

Example Input: I was looking for a Carbon Monoxide alarm that was reasonabally priced, and was glad to find this one on Amazon.The reviews on Amazon were why I purchased this one. I tested the alarm, which works well, and hope I never actually need it!!Thanks Amazon for having it!
Example Output:
Positive