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: most of the nuts in these bags were so old they had turned black totally worthless will never order again
Example Output: 1

Example Input: Very difficult to work with - tends to turn to solid rock even when following directions - taste is less than desirable
Example Output: 2

Example Input: Carabou Mahogony is the worst tasting cup of coffee I have ever had, and I've been drinking coffee for over 4 decades. It tastes just like a piece of burnt toast. The only way I can make it palatable is to put it over ice, add lots of vanilla sugar syrup and milk. I've got to find some way to justify the purchase and icing it seems to help.
Example Output:
2