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'd never heard of this brand but they were very cheap here on Amazon and I was extremely surprised at how good the Dark Chocolate Hot Cocoa is.  Absolutely worth trying, it's really quite good.
Example Output: 5

Example Input: I just received these bricks today and was very disappointed to find that BOTH of the bricks were broken and unusable as a serving/cooking plate.  They were busted completed in half. They were packaged in one sleeve of small bubble wrap in a shallow box with no other protection or packaging in the box.  I went online to try and return them and they are not eligible for return.  This is the first return I've ever tried to do in over 7 years of purchasing items off of amazon (to the tune of several orders a month!) and yet the one time that I want to return a defective product, I can't do it.  I will be much more careful about what is eligible for returns and what isn't in the future.
Example Output: 1

Example Input: I think this is a great product but my picky dog gets tired of it after a week.
Example Output:
4