Given an Amazon review, indicate whether it is a 'Positive Review' or 'Negative Review'.

Input: Consider Input: Was not the right size! This case did not fit my macbook Pro and I was unable to return it for a refund...

Output: Negative Review

Input: Consider Input: This was one of the only BTO 8GB MacBook Air machines on Amazon. MacMall had the same machine for $20 more, so I figured to order here was worth the shipping and free of the Apple Store's taxes.<br /><br />As far as the machine itself goes, what can I say that hasn't been said all over the internets? The only thing that isn't up to snuff (at least for 2012/2013) is the screen. It's *only* 1440x900 non-IPS. But since I'm using this for web development (mostly coding,) I'm not gonna need a Retina display. I save the $500 for the upgrade to the 13\" Retina and eat a LOT of sushi!<br /><br />Holy cow, this machine is light and fast. As far as ultrabooks go, the MBA still can't be beat for speed. And OSX is the most user-friendly OS on the market. APPL still has it going on.

Output: Positive Review

Input: Consider Input: I opened my very first document, a PDF file, and it locked up. Reset worked. I hope I don't have to do this every time.
Output: Negative Review