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.

Ex 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!

Ex Output:
3

Ex 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 %.

Ex Output:
5

Ex Input:
The product says a twist because of carbonation. Well after pouring the drink over 3 pieces of ice the carbonation was gone. The carbonation is definitely light and does not last. As far as the taste goes I did not care for the taste at all. It left a bad after taste in my mouth I cannot recommend this product. I will stick with regular juice at a much lower cost. To be fair I gave it two stars because my wife thought it was OK.

Ex Output:
2