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 have subscribed these chips. They are so tasty. Not dry or oily. Cannot put it down once open a bag and have to have two bags in a row.
Example Output: 5

Example Input: i had a second plant to replace the first one. it to came in sad shape, i should of went to a local nursery at least then i would of got a good plant. dont waste your time with this vender.
Example Output: 1

Example Input: The kiwi/berry combination makes this sweet and tart at the same time, with the carbonation adding a nice bit of fizz to keep the concoction light. That being said, this was a bit too sweet for my taste - but may be fine for people looking for the 100% juice experience, or those needing a sugar fix after a workout. Personally I'd mix this with sparkling soda water for a "less is more" effect, with cost savings as an added plus.
Example Output:
3