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

Input: Consider 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.

Output: Negative


Input: Consider Input: We had to buy a new lunchbox for our son after 2 months (a different brand, machine-washable) because this one is way too hard to clean. I have turned it completely inside out, scrubbed between all the cracks, and still food is stuck in the seams andthreads. It is very durable, but we can't get rid of the smell or stains with a reasonable amount of effort.

Output: Negative


Input: Consider Input: This charger is much sturdier than the mac version (which my cat chewed through in a matter of days). I'd read another review that said this adapter didn't work on the aluminum PowerBooks, but it works great for mine. In addition, the product arrived in about one day. I ordered it on a Friday morning and received it on Saturday before noon. I would highly reccomend this product.


Output: Positive