In this task, You are given a review of Amazon's food products. Your task is to divide them into two classes: negative or positive, depending on the content of the review.

Example Input: I have very hard water where I live. I use this once or twice a week and it really helps remove the build up on my hair. I'll definitely keep using this.
Example Output: positive

Example Input: I bought this in a size to fit my thumb and it fits well, stays put, looks good, and spinning the outside ring has become addictive. I like this ring a lot.
Example Output: positive

Example Input: I 'm done with this author. I always feel cheated when I come to the end of one. I know who the murderer is, do the rest is details. If you want to tell a story, then tell it and give folks their money's worth. Cliffhangers are simplely a ploy to keep folks buying more books.
Example Output:
negative