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

Example Input: Excellent product. I was having difficulty hearing and also getting a comfottable fit with the included ear hook that came with my Jabra JX-10 Series II Bluetooth headset. I removed the hook and attached one of the 6 gels that came in the pack to the headset and found that the volume increased 40% and I was able to achieve a comfortable fit. The headset is small enough and light enough that the gel holds the headset in the ear. I was about to give up on this headset (and all earhook type Bluetooth headsets) prior to getting the gels. If you are looking for a comfortable (and econimical) alternative for earhook type headsets, I strongly recommend that you give these a try. They are well worth the price.
Example Output: Positive

Example Input: I saw this movie when originally released in 1970.It had always left a strong impression upon me.Seeing it 42yrs later,is a real treat.It had created a profound impression upon me in '70 but years later it had softened a bit.The depth and beauty of Ireland is quite evident.Robert Mitchum,is stellar in this role.The story is timeless.
Example Output: Positive

Example Input: I found this boot very light and comfortable plus the fact that it's waterproof. it fits perfect in my size, it's warm and breathable too. I liked the colour very much and I was very pleased to find the product in such a good price, compared with other hiking boots that they are not waterproof at all. So far I haven't had the chance to try my boot in a heavy terrain like mud or snow but I believe that they are made for such surfaces.
Example Output:
Positive