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: The shipping was very fast, but so was the expiration date.... got it on Feb. 14, 2012 expiration is April 4, 2012 (only 6 weeks before it expires).  Who can eat so much seaweed in such a short time??????  I should have returned it, but who wants to go through all the trouble.  Well I stuffed it all in the freezer and hope it will be still eatable.  That's what you get when you order food online.  I will not order it again!!!!
Example Output: 2

Example Input: very good price and we love our keurig trying the summer flavors are great and will probably order more before the end of the summer.
Example Output: 4

Example Input: I buy these through the ship-and-save program because they are a staple of my breakfast and midday snack routine. Light, flavorful, and full of vitamins, these only take 20-25 minutes to bake with minimal extras. I am vegan so I use egg substitutes  (3 tbsps flax seed in place of the eggs with 9 Tbs water) and they still bake perfectly.
Example Output:
5