In this task, you're given a review from Amazon's food products. 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 or mixed, 4: good, 5: extremely good. 

Example Input: This is our preferred clam chowder . We like the natural taste with lots of potatoes. The only complaint is I think the soup can be creamier. Amazon has much better price on this with subscribe and save.
Example Output: 4

Example Input: The shipment was Prime but arrived in 5 days instead of 2. I love dark french roast coffee, but, this coffee tasted burnt and additionally, the flavor had overtones of trash Indonesian.  Not a pleasant experience.
Example Output: 1

Example Input: My son really enjoys Earth's Best lentil!  He eats the entire jar for dinner and always wants more.  The product shipped very quickly.
Example Output:
5