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

Ex Input:
This product requires a stereo player in which the balance is turned totally to the left. Most auto systems have that capability. However if you have Dolby or SurroundSound, it can be difficult (and maybe impossible) to play the cassette without hearing two recordings at the same time. Unfortunately neither the packaging nor the website will warn you of the problem. You therefore should think before buying. Once you have opened the packaging you may be unable to return the product.

Ex Output:
Negative

Ex Input:
I have had to replace my powerbook power cord twice already. Both times before I broke the bank by purchasing the cord from apple. Big mistake. Although steep in price those things are C-H-E-A-P! This last time i decided to go with the Macally. What a great deal! Much more durable than then apple version. It is also more compact. The only thing missing is the indicator light to let you know if the battery is charging. Not a big deal for such a great price!

Ex Output:
Positive

Ex Input:
This is a very handy little book. It answered many fundamental questions I had about the Buddhist philosophy. The book helped me to realize that I am a Buddhist - no matter where I am in my path.

Ex Output:
Positive