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

Ex 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.

Ex Output:
Negative


Ex Input:
Book is a great read. Intriguing from start to finish. Cant find anything wrong to say. Would reccomend for beginer to advanced readers.

Ex Output:
Positive


Ex Input:
This thing has about 3 poems in it. Terrible! Do NOT waste your time!!!!!!! Extra words extra words extra words

Ex Output:

Negative