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.

Ex Input:
Lonely Planet Mexico . Excellent book full of useful advice about travelling in Mexico. Really helped me to get an insight into the country and where i would like to visit while i'm there.

Ex Output:
POS


Ex Input:
A book full of examples of how NOT to write perl . I couldn't resist the title, so I got this book. Unfortunately, I cannot reccommend it to people who want to learn to write better Perl, execpt as a source of examples of the mistakes you should avoid.    For example, in one of the earliest examples, the authors uses "return undef" in a situation where the return value of the routine is assigned to an array, to indicate the routine didn't find any of whatever it was looking for. Unfortunately, this is a mistake, the correct code would be to use "return;" all on its own. The correct solution produces an empty array or interim values; the mistake creates an array containing one element, 'undef'.    There are a number of similar mistakes which indicate the author is in over his head, writing things he doesn't understand; the editors know even less about the matter; and the code was never tested and verified for correctness.    If you want to learn Perl, get "Learning Perl"; If you want to improve your Perl, get "Intermediate Perl.    To

Ex Output:
NEG


Ex Input:
Save Your Money . Brian Hinton's Both Sides Now is a complete disaster.  What could have been a promising biography of Mitchell is instead a garbled mess.  Indeed, Hinton's text is relatively void of biographical information.  Rather,  Hinton relies on a handfull of interviews published of Mitchell's, and he  quotes from them in such large chunks that the reader would be the wiser to  check out the interviews from their sources.  Following a brief, and  flawed, biographical section, Hinton uses the rest of the text as a forum  for his interpretations of Mitchell's work.  Album by album, song by song,  Hinton gives his own personal commentary on Mitchell's music so that the  text ends up reading like a diary of Hinton's own personal reflections.   Moreover, Hinton's analysis of Mitchell's songs are sometimes so off-base  and confusing that the reader is left wondering how he comes to these  conclusions.  Finally, his constant personal comments in the text make it  seen like nothing more than a high school writing assignment

Ex Output:

NEG