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

Example Input: You aren't saving any being this adapter. I purchased this for a 12" G4 Powerbook. The power it supplies goes on and off constantly. This can't be good for the computer. It certainly doesn't charge it. Don't waste your money on this Macally adapter. Try to find an original Apple adapter if you can.
Example Output: Negative

Example Input: Hawthornes The Scarlet letter is an okay book. It has an okay plot and okay characters, but the book is not one for teens of the 90's. I had to read this book for my English teacher and to tell the truth if it were not graded I would not have read it. The teens of today do not want to read about the ancient customs of puritan society. If it had been about the scandalous affairs of Hester and Rev. Dimmsdale it would still be a best seller. I think this book should be only read voluntarily. If you are thinking of reading it you may need to reconsider.
Example Output: Negative

Example Input: I bought "The Grass Is Blue" on the strength of the rave reviews which appear below. They didn't lie. This is one of the finest things I have ever heard, from ANY musical genre. I played it for my wife, who has zero bluegrass background, and she was just swept away by it. Every cut is strong, but the odd-numbered tracks appeal to me most, with "Steady As the Rain" being a particular highlight. Be warned, "The Grass Is Blue" may permanently hijack your musical tastes. Now when I listen to blues and rock standards that used to appeal, I just can't sustain interest for more than a few minutes. Nothing compares to the power, the purity, the soul that Dolly Parton delivers. I am compelled to go back to "The Grass Is Blue" for another deep drought of that cool living water. This is one album I never want to live without.
Example Output:
Positive