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.
Q: I'm glad these are good for the environment and they work okay but they don't work as well as the ones that are cheaper and bad for the environment. Sigh.
A: 
4