Instructions: Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.
Input: When you buy this book (10th edition), do not buy the one with the CD-ROM. It is not the right one (it is the 9th). All the books with CD-ROM have the wrong one. The correct one comes out in October. So if you want to buy this book do NOT take the one with the CR-ROM, because you're going to waste money!!
Output:
Negative