In this task, you're given a review from Amazon. 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, 4: good, 5: extremely good.

Example Input: I bought two of these because I'm hard on chargers and was hoping the metal would help. One of them came broken so that was a waste. But the one that does work is pretty great.
Example Output: 3

Example Input: Like other reviewers, I'm disappointed they changed the formula. My dog has a bunch of problems and pees/poo's himself everytime he goes out. I use these in-between baths to keep him clean and they used to be a LIFESAVER. With the new formula he doesn't get nearly as clean as he used to and he still smells. They work and I be see soils coming off, just not completely.
Example Output: 3

Example Input: I did not think it was worth the price I paid, I took the fingerprint of my baby's foot and hand and it was very irregular, with terrible failures, I think it's not worth paying, wasted money. I did not receive any books
Example Output:
2