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 is a cheap solution to missing or damaged bite valves on water bladders. Yes, they can leak a little bit. Not really any more than standard bite valves. I've gotten to the point that I buy the cheap bladders and sometimes the bite valves fall off or fail. Generally, the bladders are just as good as the full price ones, sometimes better.
Example Output: 4

Example Input: Seat is really wide. Seat Material is soft vinyl gets very hot from sun and doesn't breathe. Springs suspension is ok, better off with a lever action suspension seat post.
Example Output: 1

Example Input: Advertised as durable, anti-scratch, etc....and of course they have the 3M name, and are therefore more expensive than most others. These scratched faster and easier than any pair of safety glasses I have ever owned. Not again.....I will stick to the cheap, durable ones.
Example Output:
2