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 recieved a Keurig K-Cup Brewer for Christmas with sample cups of coffee and tea but no cocoa so I tried this brand and I like them but I haven't tried other brands yet to compare with. I would buy these again until I find one I like better.
Example Output: 4

Example Input: Many reports are coming out about how chocolate is actually good for you, so eat more!  This is the perfect chocolate to do that with.  The varying levels of cocoa are perfect to help adjust your taste buds to eating dark, dark chocolate. It's not an easy transition for a milk/semi-sweet kinda gal, but this chocolate is affordable and so tasty.  I also like that I can just have one (as they are individually wrapped), and choose my %.
Example Output: 5

Example Input: I am disappointed since regular wheat thins don't have MSG, but this variety does.  I need to stay away from MSG, since I get migraines. I am sure Nabisco can find a way to make a flavorful cracker without MSG. These crackers have a very strong taste, and I found that the taste stayed in my mouth for a long time. I prefer the original, unflavored wheat things.
Example Output:
2