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: We've only used this once, but it kept us awake most of the night.  We were surprised because it's decaf, but we couldn't sleep for hours after going to bed.  Tastes good, though.
Example Output: 3

Example Input: While the product is delicious, it's annoying that the peanut butter stays on the waxy paper instead of on the product. You need a fork to scrape the peanut butter off the protective top sheet.
Example Output: 1

Example Input: Just in case you don't know - these are about $4 a box at the store, so anything more than $12 for a 3 pack is not worth it.  This is a great product, though (that's what the 4 stars are for).  The pancakes & pizza dough are great, I make them all the time.
Example Output:
4