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: This is a great product, we have made custard with it for years and it always makes great custard. We will purchase this product again. Amazon does a great job of getting us our purchases fast and without damage.
Example Output: 5

Example Input: I like the taste, but the light roast was too light for me.  I find myself brewing smaller cups of coffee, hoping for a stronger taste.  Next time, I'll go for a medium or dark roast.  I think it was the medium that I had before and I really liked it.
Example Output: 3

Example Input: Raving reviews made me buy this for dogs. I have a lab mix a beagle and 2 Shepards that I got from impoundment and they're not spoiled. One chewed it to crumbles but left it on the ground and my Shepards have been burying them in the backyard. I wasted my money on this one.
Example Output:
1