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

Example Input: my scanner hasn't worked since the day i took it out of the box, installed the software, and the green light is on but when i hit scan it does nothing! looks like it's a dud. lol.
Example Output: Negative

Example Input: I have had the charger for more than two years. It charges AA batteries just fine, but has a huge problem securing smaller AAA batteries. To charge the smaller batteries you need to flip down the little button at the positive end. In the beginning one of the four AAA batteries would pop up, and now three out of the four won't hold. The problem is the flip mechanism became loose, and any horizontal pressure would push the buttons back up. What I have to do now is using duct tape and a segment of crayon, apply the crayon on the buttons, and wrap the tape around. You know how painful that is.
Example Output: Negative

Example Input: This product is a good idea however:1. The fill hole, is not large enough to fill the bottom of the dishwith hot tap water without getting water into the serving tray.2. Can't be put in the Micro.3. Extremely hard to open bottom compartment to clean.4. Extremely hard to open and close ( I and my daughter have to use abutter knife to pry open).5. Not good for a grandmother's hands that has joint problems.6. Doesn't keep food warm for very long.Perhaps going back to the drawing board would help this product!
Example Output:
Negative