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

Ex Input:
Worst app. It doesn't work at all

Ex Output:
Negative

Ex Input:
Great this one is the best..it requires accessibility it will never fail to read you noti

Ex Output:
Positive

Ex Input:
I'll forgo the refund. But no go with Watson dongle... Nexus 9. Yet to try on Nexus 6p. So very disappointed!!! :-(

Ex Output:
Negative