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 haven't done any serious studying for my exam. This will be the first time I've ever sat at a exam after watching a TV show and looking all over this book before I go into each section, trying to find anything. I can almost get through it...
Example Output: Bad review

Example Input: Got the book as a birthday present. Very dissapointed that it's only 40 pages. I thought it was around 150 pages and way overpriced. There are better books on the market. If you can't find a well reviewed one pass this one. I'm trying to return for refund. Really feel scammed. Thanks Amazon. :/
Example Output: Bad review

Example Input: The product did not work as advertised and did what it said nothing else. I have tried several times to try again but so far no results. It does take about 3 days after pill to work. Then they don'thing! They don't show on the blood test. For a diet that takes more than 2 weeks toactually work, there is only one solution!!!! Don't buy. This item was shipped fast, however. Just never worked. And in case you want to, all products are under review.
Example Output:
Bad review