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

Input: Consider Input: A really fun book, well worth your time if you like Pratchett. None of our old pals [Rincewind, Gaspode, Vimes, Susan] put in an appearence [other than the guy WHO TALKS LIKE THIS and an old monk with a broom, and they but briefly], but it does add some info to the overall Discworld mythology, and provides some laughs as well.

Output: Positive


Input: Consider Input: This book came out a long time ago. I read it when it first came out and it introduced me into the world of ghosts and and lore. I was 12 years old then in 1982 and even now when I pick it up to read....it still takes me back to the feeling...when I first picked it up and sent shivers down my spine...in a fun way of course. The stories and the drawings were perfect together. A great book. I have all 3 volumes now and I hope he comes out with a 4th one soon.Thanks Alvin and Stephen for scaring the pants off of me when I was 12.

Output: Positive


Input: Consider Input: Pro: Soft-closing valve mechanism prevents water hammer effect.Cons: Programming is not intuitive. Cannot adjust the manual valve-open time duration; it is fixed at 15 minutes (the manual states it is possible to adjust this, but I did not see how). 9V battery didn't last a week.


Output: Negative