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

Example Input: I bought this from the same co. before christmas and was stunned that the price had doubled. On the page the price was not clear!
Example Output: Negative

Example Input: They have a little bit bigger size . I ordered a medium shirt for my kid and its a little bit big. I haven't wash it yet if this shrinks it will be perfect for him.
Example Output: Positive

Example Input: You hear about prescription drug addiction but don't really understand it. This book takes you into Barbara's life with such an addiction. The writing is excellent. There is so much detail regarding her struggle back to a normal productive life. I have a new respect for individuals and their families with this illness.
Example Output:
Positive