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: Like always this label is the best in desserts and this 3-4 ounce vanilla pudding is not the exeption, is easy to make, and vey fast, and the size is the best for a little families. The vanilla flavor is fantastic.
Example Output: 5

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: These crackers taste absolutely delicious, but leave a coating/aftertaste in my mouth that lasts for a long time.  Also, they contain MSG and for some people (I'm one of them) it causes a headache.  The last time I binged on these crackers (and they are hard to put down!), I ended up with a crashing headache.  Be forewarned!
Example Output:
2