Given an English language product review, determine if it is a Good Review or a Bad Review. A good review is one where the product's review has positive tone and Bad review is one where the tone of product's review is negative.

Example Input: I bought this product on December 5, 2012. However, the battery died already in March 2013. In May 2013 it was hard to charge - sometimes you had to press and hold but by July after 10 uses (I was listening for about 2 hours per day average) It started acting up. The bluetooth stopped working so music sounded like the speaker is blown. So no matter how much I try to fix it, it's useless. Don't buy this!
Example Output: Bad review

Example Input: This is the worst book on personal finance that I have ever read. I would recommend this book to those with no economics background! Nothing new here. Buy Michael Lewis' books instead. The advice given by Mr. Kiyosaki are similar in nature but much superior.
Example Output: Bad review

Example Input: This isn't worth the money.. The plastic screen doesn't adhere to either of my iPads... I would be very embarrassed to give these as gifts. They're not even good enough for a kid. Not worth it at all!!!! DO NOT BUY!
Example Output:
Bad review