Given the task definition and input, reply with output. 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.

Disappointing . If it wasn't for the fact that I listened to the audio book version during my daily commute to work, I probably would have abandoned this book halfway through. The end is confusing, and I'm left wanting more, not in a good way
NEG