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

Ex Input:
I ordered this DVD and received a substitute I never received the DVD I ordered from Importcds (the Vendor). I contacted them and did not recieve any feedback. I can't rate a DVD I have never seen. I didn't bother to send it back because it would have cost me more that I orginally paid for it. In the future I will watch for the name of the person and/or persons I am buying from. I thought they were a good company. I understand a simple mistake but, to not get a response at all is not good businees sense. I spend hundreds of dollars a month on Amazon.com building my DVD collection. I guess I will be more careful in the future.

Ex Output:
Negative

Ex Input:
I had almost all of the Jean Auel's books and needed this one to complete my collection. It turned out to be a book club size and I traded it to a friend for the full size version.

Ex Output:
Positive

Ex Input:
The cover of this book makes the masks look intricate and impressive. On the inside, they look cartoonish. For a Halloween costume, I had more success by blowing up photos of Noh masks on a photocopier and then cutting out the eyes.

Ex Output:
Negative