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

Example Input: I am a complete Sudoku addict and am very disappointed with this book. The only reason I bought it was because I was desperate for more puzzles and it was the only one available at the store I was in. First of all, it costs $4.99 which to me, is way too much money when you can get a Kappa book for $1.99 which has better puzzles. Another thing that bugs me about this book is that some of the answer keys in the back don't match the corresponding puzzles. When I get to the difficult/Very Challenging ones in the back, sometimes I need a little help! But unfortunately, this book has quite a few errors in the answer section so when I've hit a dead end, it's over.I would recommend Kappa books from your local supermarket. This simply costs too much money for not mush quality.
Example Output: Negative

Example Input: What else can I say? All that love CB should own this DVD. I love Charlie Brown and this is a true Christmas classic.
Example Output: Positive

Example Input: This book was terrible! Half the characters did not have an ending and no main character is apparent. Then again, I'm a freshman in high school and may be a little inexperienced to judge so harshly. I personally dislike Dicken's wordy style of writing because it's easy to get lost. If you like Dickens, and you don't mind his writing style I'm sure you would probably disagree with me. I'll give it a two.
Example Output:
Negative