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

Example Input: As most people readers know, Jack Higgins has written many fine action-packed books. However, this book reads like a twelve-year-old wrote it. The characters are so transparent they could be ghosts.The author and his publishing house must really need the money to rip of the public in this manner. This is the last book I read by this author. One can only rest on his laurels for so long. I'm glad this book was handed down to me or I would have written a really nasty review.
Example Output: Negative

Example Input: This product worked for 4-5 times and the rotation stopped working. Batteries run out or lose power after 3-4 uses. I would read reviews before buying another one... I am looking into the Hitachi wand massager now and I believe I will buy it since is a power operated toy and will never run out of power.Not impressed with this product.
Example Output: Negative

Example Input: I am unable to review this product as the item NEVER arrived and I ended up with a refund.Will be looking for another source, and trying to order it again.If and when I finally do get the item I will let you know what I think about it then.
Example Output:
Negative