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 keep this on hand for the young at heart.  We enjoy a cup almost every night.  Good taste.  will buy again.
Example Output: 5

Example Input: It's okay but it does not have a rich chocolatey taste. I actually find it to have a funky taste, can't quite figure it out.
Example Output: 3

Example Input: Butternut Mountain Maple Syrup is the real deal. The grade B is wonderful on pancakes, or in coffee- just about on anything you'd like sweetened. Delivery was timely and the product came as expected. I recommend this!
Example Output:
5