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

Example 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.
Example Output: Positive

Example Input: I love the story line of this movie - a male Fairy Godmother! What fun. And Kathleen Turner as the 'wicked witch'. What a fairy tale concept.
Example Output: Positive

Example Input: I used these in the hospital when my baby was born and they are great!Now I have them in my baby bag along with the formula bottles and I always have a clean nipple when we are out. I recommend them.
Example Output:
Positive