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: These taste wonderful! Guilt free if you can stop at one bag. Will definitly buy again!
Example Output: 5

Example Input: When I got my Keurig brewer last month, I bought two different types of hot chocolate. The Grove Square Hot Chocolate is far superior. I have so far brewed it on 6oz and 8oz with good flavor at both sizes. The flavor is rich and it leaves no residue in the bottom of the kcup (the other brand does, maybe I got a bad batch?). Overall, I will happily buy this one again.
Example Output: 5

Example Input: I like this coffee. It smells good while brewing and tastes as good as it smells. for a decaf coffee it is very good will definitely buy this at my local store.
Example Output:
5