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: I love this popcorn. Only downside is the shipping and packing. Cost almost as much as the popcorn. Need to pack it better. Bag split and a bunch of loose popcorn falling out of the box when the guy brought it to my door.
Example Output: 5

Example Input: I agree with the other review, these chips are not for a sore mouth or tender gums. The chips are very hard and the taste is delightful if you enjoy the salt/vinegar combo. Unfortunately, every bag I received in that case was over cooked! They were very dark and only a few golden brown chips in each bag. They definitely need to improve that!
Example Output: 2

Example Input: This is a very mild hot cocoa.  Perfect for those winter evenings or even good in the morning instead of coffee.  We love it anytime.  Next time I will try the dark chocolate.
Example Output:
4