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

Example Input: This is nothing new from Gail Howard, or at all. These wheeling systems can be worked out mathematically, without paying for this book. There are also lots of websites that offer number generators and wheeling system explanations for free. If you want it all spelled out for you then buy this book, but if you are willing to do a little mathematical work check out lottery information website like [...].
Example Output: Negative

Example Input: I'm sure the information presented in this class is good, but the presentation set my teeth on edge. Sheri thinks she is funny when she talks in a screeching voice and makes fun of new mother's foibles in her "funny stories". I cringed every time I heard her squeal as a pretended mother with a problem. If you can get past her, then I guess the DVD can give you the information and techniques you need for Lamaze. But unfortuanately Sheri spends more time talking or shrieking while trying to be amusing than just giving the information you would like to hear.
Example Output: Negative

Example Input: I'm a 13 year old kid and I just finished reading this book for an English class I am taking. Although it was a very interesting and provkitive novel. I did not like it very much. I think it maybe that I'm still too young to throughly understand this piece of literature.
Example Output:
Negative