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 don't really hate it, because my order was cancelled for some unclear reason. The order was cancelled several days after I placed it, so I'm no fan of Intex.

Ex Output:
Negative


Ex Input:
I just now purchased on Amazon my third pair of Hi-Tec Men's Altitude IV Boots (over the course of 10 years). I live in Minnesota and have found these boots to be excellent in all types of weather, year-around. In addition to wearing these boots every workday on my warehouse job, I do a lot of weekend hiking, camping and exploring of the North Woods and have never been disappointed with these boot's performance. When worn (and sized) for a good pair of extra cushioned wool socks (I buy Smartwool Trekkers Series), these boots are warm enough for shoveling snow and are also comfortable and cool enough for summer wear. It is a perfect light, all around utility boot and I highly recommend them. They are the only boots I have ever literally worn out (they never failed due to workmanship or materials). I just replace the shoestrings with a good quality boot lace and they "keep on running"!!

Ex Output:

Positive