In this task, you're given a review from Amazon's food products. Your task is to generate a rating for the product on a scale of 1-5 based on the review. The rating means 1: extremely poor, 2: poor, 3: neutral or mixed, 4: good, 5: extremely good. 

Example Input: I purchased these little treats as stocking stuffers for our little furry friends.  Both Yorkies LOVED these treats.  We had to finally buy more since they liked them so much.
Example Output: 5

Example Input: Folks who are comparing this to Hodgson's blueberry muffin mix obviously don't require gluten-free products (since the blueberry are whole wheat muffins). If, like me, you require gluten free, this is a great product. This is the first flavorful GF baked good I have stumbled upon. Very simple and quick to make. Like all GF products, they are pretty dense in the end, but the apples make for a nice addition and they fill you up. Personally, I added a bit more "sugar" (xylitol) than the recipe calls for. Next batch, I will also add some fresh apples and extra cinnamon. My only complaint is that you get so little out of the box (makes 6 small muffins).
Example Output: 4

Example Input: I have been searching for a natural lemonade drink mix that would actually taste good.  This is not one of them.  Did not like the the bitter taste of this drink mix. I can make my own fresh squeezed lemonade better than this stuff.  In the mean time I purchase Newmans Own ready made lemonade if I don't have the time to make my own lemonade.
Example Output:
2