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

Example Input: I have only wore these boots a couple of times, so I may be reviewing them too soon. As other reviewers have stated they don't seem to need a break in period, but there is a certain "learning" period. I say this as a person who literally has worn nothing but tennis shoes for years. The learning is getting used to the extra weight and bulk on your feet. I bought these to be a part of my "bug out" plan. I will soon be going on a real hike on rougher terrain to see how they feel then. Plus until I have put many more mile on them to see how they hold up I can't say for sure how many stars they deserve. I give them 4 for now and assuming 200-300 miles from now they are still in good shape I would change it to 5.
Example Output: Positive

Example Input: Personaly this is one of my favorite books. It's one of those books you can read and re-read again and agiain, without getting sick of it. The way Farris is writtin and the way Alanna portrays him is awsome. Then the differennce you see from Farris-to-Bantam is wonderful. If you like reading books that don't hold back and make the characters seem above everything, but sound realistic but also adds magic in with that then, this is a book for you. This also isn't one of those constant blood-bath books or romance all the time books or the main "character gets the girl everything turns out in the end" books. It also doesn't have a tragic end were you begin to wish you'd never wasted your time on it. No when you finish reading this book you will NOT regret reading it. I've said to much. Oh, well. Read it and see for yourself if you agree with me!!!
Example Output: Positive

Example Input: I love this air mattress! Very easy to set up and put away and very comfy to sleep on. I have slept on other air mattresses before and this is by far the best one I have ever slept on. The soft top makes it so you don't feel like you're sticking to it, but I put a blanket over it anyway for extra comfort. I have been recommending this one to all of my friends, I'm very happy with it!
Example Output:
Positive