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

Ex Input:
Very intuitive in explaining the basic concepts and the fundamental and widely used methods in continuous-time finance. No deep background in math is required to have a good grasp of this book. I believe it is intuition rather than fancy skills that is important to build up interest and passion for studying a hard topic such as continuous-time finance.

Ex Output:
Positive

Ex Input:
I don't really hate it, because my order was cancelled for some unclear reason. The order was cancelled several days after I placed it, so I'm no fan of Intex.

Ex Output:
Negative

Ex Input:
Great idea or so I thought. I fell for the marketing hype. This little gadget is nothing more than a time stamp. You plug it in and it reads the time stamp and shows you what was playing on the radio station that you pre-selected when you registered on the web. If you were listening to a different station, you have to look it up on their site, which defeats the purpose of this thing. You can already look up songs on the net without this gadget. In fact, you can do it better without the gadget, because, emarker's coverage is limited (No AM, jazz, classical, or music videos). Save your money!

Ex Output:
Negative