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

[EX Q]: 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.
[EX A]: Negative

[EX Q]: Well, this was a perfect ending to a long busy day. I ordered the movie under the Tucson Sun to sit back and relax. It was very very enjoyable. I'm saying all this in a long-winded way because this review requires I write 20 words. This is actually kind of a pain because I am turned off about writing anything about these. But it was a fine purchase.
[EX A]: Positive

[EX Q]: Within 24 hours of using this product there is already a huge difference in my skin. I love it! It's light, it smells great, and it really does what it claims to do.
[EX A]:
Positive