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: This masque really softens my hair. I wash my hair, put on the masque rinse it after 5 minutes and the difference in my hair is night and day. Cant live without this!!
Example Output: 5

Example Input: My main issue with this set is that the tunnels themselves have sharp backs, which makes pushing them through when going up in size painful. I've decided that I won't be using these to get to the size I want.
Example Output: 2

Example Input: I really wanted to like it, but it was so confusing, from the first chapter on. The part where a guy who seemed normal is suddenly evil, calls her body a chassis while flirting. I didn't get much further than that.
Example Output:
1