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: These bars are just the right balance between the flavor of the coconut & the sweetness of the rice syrup. Unfortunately, although the expiration date is in 2013, about a third of mine went bad, or perhaps started life that way. They had a funny, metallic taste, & one even had some black substance on it, which may or may not have been mold. I'm wondering if refrigerating would have prevented this. I highly recommend these bars, but beware of the keeping quality!
Example Output: 3

Example Input: At last- a decaf coffee that doesn't taste decaf!  Smooth, rich, flavorful, with no bitter aftertaste.  Starbucks worthy (but to my husband who doesn't care for Starbucks, it's way better).  We like to drink this in the evening and it's basically dessert with cream and sugar.
Example Output: 5

Example Input: I used to use this coffee after we visited Costa Rica and gave some to my aunt.  She thinks it is the best coffee there is, so I gave her some for Christmas.  It is excellent.
Example Output:
4