In this task, you are given books product reviews in English language. The goal is to classify the review as "POS" if the overall sentiment of the review is positive or as "NEG" if the overall sentiment of the review is negative.

Example Input: excellent reference . Like other reviewers, I agree that a book is no substitute for instruction by a teacher.  Nevertheless, this comes as close (for the Yang style short form) as anything I've found.  Even if you have no interest in the martial aspects of taiji, having the potential applications of the form enriches practice.  I found the illustrations clear.  I own a half dozen or so books on taiji, and this is the only one I regularly consult
Example Output: POS

Example Input: Count me in the minority . Unlike most reviewers here, I really disliked this book.  The main reason is that the entire novel is a gimmick without any real substance.  There is no reason to tell such a dull story except for the fact that there is some mysterious story-within-a-story complexity.    The characters, especially the protagonist Iris, are bores.  Iris is like a 300 page wet blanket.  Most of the other characters are 1-dimensional cut outs.  Her sister Laura is the exception, but she got on my nerves too with her one-note quirkiness.    The story-within-a-story is more a gimmick than anything else.  The science-fiction meta-story within that story I thought was the most interesting part of the book, but it goes nowhere and its purpose is even more tenuous than its parent.    Finally, this is my second Atwood book, and I really dislike her writing style.  It reads as if she is trying too hard, and even the simplest situations feel forced.    I don't understand why everyone seems to like this book, but I would just suggest not to believe all the hype.
Example Output: NEG

Example Input: Far, Far Superior to Guyton, in my opinion. . Both Guyton texts I received were manufactured defectively, coming unglued along the strap of the spine. Poor job, Saunders. Typical. Vander's Human Physiology is an excellent textbook in the sense that it answers all of the right questions at the right time, while you are studying. Also, more chemistry in Vander's, and in the long run that was important to me, since the atom is the basis of everything. Beautiful illustrations and photographs, and again, when compared to Guyton (where the illustrations were cheap and even shameful ... made by a high school art student?) the professional presentation and pedagogical context of Dr. Eric Widmaier's text was much better than the "Old" standard. Depth of coverage in some areas might be slightly less, but still the learning is there for the taking. I love this textbook, and I am convinced students studying from it will fair as highly on board examinations as those trying to learn from any other standard text in the field of introductory physiology.
Example Output:
POS