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

Ex Input:
Although good quality product, it doesn't fit my ear at all. None of the sizes fit comfortably or snug. I can't use it at all and just wasted my money.

Ex Output:
Negative


Ex Input:
Currently, there are no wholes throughout the bed. But, for some reason when I wake up. The bed is already out of air. I only weigh 120lbs. I don't understand why it does that. Please save your money, when you start to have the same problem.

Ex Output:
Negative


Ex Input:
This book was delivered on time and in the condition advertised. I would purchase a used book again from this source.

Ex Output:

Positive