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

Ex Input:
I purchased this MP3 player as a Christmas gift for our daughter only to find out on Christmas Day that is not compatible without our computer despite every update available. While we could see the preloaded video and it is very clear and bright, we were never able to upload any music. My husband (who is computer wizard) spent 12 hours trying to get this thing to work, but without any success. Next time we'll buy an IPod.

Ex Output:
Negative

Ex Input:
The adapter worked fine for my power book g4 for a few months and then it broke. Nothing physically happened to the adapter for it to break, but suddenly it just wouldn't charge any more. What's interesting is that the blue light on the brick goes on when plugged in to a power source, but if I plug the cable that attaches the computer to the brick in, the light goes out and it doesn't charge.

Ex Output:
Negative

Ex Input:
This bra is completley worthless! It offers absolutely no support, is cheaply made and does not run according to size. Don't waste a penny on this. You will be disappointed.

Ex Output:
Negative