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: love the ease of having green natural tea anywhear any time . tastes great i love this stash green tea
Example Output: 5

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 absolutely loved Newman's Own pretzels with the pepper baked right into the pretzel for just a little bite. These are not as tasty and yes, they are messy and overly seasoned.  Not really a fan of this line of flavored broken pretzel pieces, although this was a little better than some of their other flavors.  Someone out there needs to try making the baked-in black pepper version again, please. Not sure why Newman's Own stopped.
Example Output:
3