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

Ex Input:
Worked like a charm all over England. I haven't tried the other adaptors, but I found my MacBook to work just like it does here in the US, and there was no difficulty plugging into the outlets.

Ex Output:
Positive


Ex Input:
This was the biggest waste of money ever created. If you want to know the song that much, call the station and ask them, they don't mind, really.

Ex Output:
Negative


Ex Input:
My kids love these pens. They last and last.I had a set from the late 1970's and I could still color with them.This was our 2nd set for the kids and deffinately will purchase again.

Ex Output:

Positive