In this task, You are given a review of Amazon's food products. Your task is to divide them into two classes: negative or positive, depending on the content of the review.

Ex Input:
Arrived promptly. I received it today and began taking immediately. It contains so many vitamins, such as A, C, D3, E, B6, Folic acid and of course biotin, etc. I believe in this product and hope it will deliver promising results.

Ex Output:
positive


Ex Input:
WOW...A must for any Chess player. Quality in every way. Buy it for yourself, buy it for a chess player in your family. A chess tournament in a portable case. Look, at the others, read the reviews, then buy the real deal...!!!

Ex Output:
positive


Ex Input:
This was very carefully installed, I carry my phone in a wallet case for extra protection. The screen protector cracked soon after installed and now has bubbled up. There is only 1 in a pack.

Ex Output:

negative