Given the task definition and input, reply with output. 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.

Been wearing them for 5 days both to bed and all day. The pain has only been in my right heel. Since wearing these the pain is almost totally gone during the day. I feel some just when I wake up or have been sitting for hours at my desk at work and get up to walk. But the discomfort level is reduced by about 80 percent.
4