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

Ex Input:
This product does not work with my ibook G4. As stated by some earlier reviews by other customers, the charger toggles between charging and not charging. Occasionally, if it is left on, it will continuously charge. I thought about keeping it, but it is unreliable and there are other third party options for $10 more.This one is going back to Amazon.

Ex Output:
Negative


Ex Input:
I like the book Castle In the Attic because it was very adventurous. My favorite part in the book was when Mrs.Philips gave William a gift. Do you know what the gift was? Can you figure out what it is? I recommend this book because Castle In the Attic is a very exciting novel to read.

Ex Output:
Positive


Ex Input:
from start to finish it left you with knowledge and a possible desire to get in deeper. i read the entire book in only two sessions.

Ex Output:

Positive