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. 

Ex Input:
I wouldn't even think of buying this product unless I know the price per unit. How can I compare other items online or in a store?

Ex Output:
1


Ex Input:
I drank this coffee over 30 years ago when I lived in The Netherlands. So glad that I can get it through Amazon. Strong, full bodied but easy on the tummy!!!

Ex Output:
5


Ex Input:
Popchips are a healthy and light alternative to regular potato chips.  They are full of flavor, and only 2 Weight Watcher points per delicious bag!  I have shared these chips with family and friends, and they are all now fans!<a href="http://www.amazon.com/gp/product/B001RVFDOO">Popchips 6-Flavor Variety Pack, 0.8-Ounce Single Serve Bags (Pack of 24)</a>

Ex Output:

5