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: Not quite what I was expecting . A Journey to the Center of the Earth did not turn out to be quite what I was expecting; I can't say quite why, however, because I'm not entirely certain what those expectations were.  I hadn't read the novel previously, but I thought I knew what it was about.  As a result, I think I was expecting more drama than Verne delivers, or perhaps I simply wanted the book to be more than it is.  Most likely I was conflating Verne's novel with other texts: movie adaptations of the novel itself, for instance, in which considerably more in the way of actual antagonism--as opposed to the perils of nature itself--occurs; or hollow world stories, in which entire societies thrive on the inside of the earth's crust beneath the rays of a sun that lies at the planet's center.  A Journey to the Center of the Earth is neither of these things, of course, and if I underwent any disillusionment, it was purely of my own making.    Understood on its own terms, the novel is, at the very least, interesting, but, truthfully, not much happens.  The narrator's speculations (as well as his fevered dreams during times of travail) suggest a much wilder adventure than actually takes place.  Much of the action involves the trio of explorers stumbling around in caverns and tunnels, and much of the impediment takes the form of hunger, dehydration, or equipment loss.  In fact, as best I can judge, they really don't approach anywhere near the center of the earth, although they do travel quite a distance laterally before resurfacing.    The real joy is the interactions between the characters, primarily the trio of protagonists: the young narrator, his scientist uncle, and their silent, idiosyncratic guide.  The expedition leader is an archetypal nutty professor, whose words and actions seem nonsensical to those not privy to his thought processes; his nephew, the narrator, alternates between sheer wonder at his surroundings, and sheer terror at the likelihood of spending the rest of his short life surrounded by them; Hans, the guide, says almost nothing but performs his duties in an exemplary manner, and insists on being paid weekly rather than all at once, even while under the earth (a square deal, in his eyes).  Their interactions with each other, and with the variety of Icelandic folk they encounter on their way to the volcano which is their means of ingress, are wittily and cleverly depicted.  These character moments are the high point of the novel; one wonders how much of their clever interplay originates with Verne and how much is an invention of the translator (who, in this edition, remains sadly anonymous).  Whether the novel's tone in its English version is added or simply preserved in translation, full marks to whomever this perceptive soul is.    Though one reflexively considers Jules Verne a "science fiction" writer of a primitive sort, this is really more of an adventure tale and, taken as such, it is generally successful.  The adventurers don't explore a strange new world so much as become more intimately acquainted with the world they already know, but if the reader doesn't go in expecting flights of pure fancy, the novel is rather satisfying.    Postscript: I should point out that this review refers to the Signet Classic mass market paperback edition of the novel, which features an afterword by Michael Dirda.  Knowing Amazon, it's possible that this review will surface under several different versions, and without clarity, we have nothing.
Example Output: POS

Example Input: A must-read. Period. . I recently read Berlinski's book as well as Bawer's "While Europe Slept"  and "Anti-Americanism" by Jean Francois Revel. These are very important books in that they shed light on the mythology of the American Left, according to which Europe (Western Europe, that is) is the Promised Land. Since they detest America, they need to find some model to emulate. Well, on closer inspection Europe is not it. Today's Europe had been left hopelessly behind. It lives off the corpses of the past, and having been given a sense of security (by the American foreign policy and its military might) and illusion of prosperity (originally spawned by US economic aid and today dependent on US spending power!), they feel superior to the US. Anyone who ever debated angry Europeans will quickly discover that the superiority is really a reaction to their profound inferiority complexes.    Disregard the one-star reviews. An M. McDonald below claims that the book is "short on facts"... This from a guy who claims that Germany is the world's largest exporter... Forgot to mention though that it's the larger exporter of MERCHANDISE. If you add services, the US exports are at $1.15 trillion vs. Germany's $893B. And, thanks to diversification, the US is less vulnerable to global economic slowdowns. McDonald's is wrong. He's wrong about public education too: Europe's schools are "vastly superior"?...Does he have any idea what goes on in the schools of Paris, London and Rome?? he says China not seen as a threat to EU? Anyone who's been to Italy recently, with interests going deeper than gelato, surely must have seen numerous campaigns against Chinese textile imports. My bet? In 5-6 yrs we will be buying superior quality suits made in China for $500 vs. Zegna's $1800 outfits. Indeed, nothing to worry about. Etecetera, etcetera.    Read this and the other books I mentioned so you can be immune to and be able to eloquently respond to this type of leftist pap
Example Output: POS

Example Input: it's a reminder . If you haven't learned from a teacher, you won't learn from this book.  It does serve, however, as a reminder for someone who has moved away from other practitioners, so that a thorough workout doesn't leave out any of the forms, letting it fade into the oblivion of the memory
Example Output:
NEG