In this task, you are given an app review. Your task is to identify whether its sentiment is "Positive" or "Negative".

Example Input: Not working Not working at oppo. Saying source not available for hr
Example Output: Negative

Example Input: Xperia Z Tablet Grabbed the app to play around with RTL SDR. Better signal clarity than SDR# on my laptop. Very happy so far with $15 total investment. Dongle powered up straight from the tablet. Don't have a HackRF to test.
Example Output: Positive

Example Input: Best Voice Notification app I love this app. I use it pretty much all the time.
Example Output:
Positive