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: Maybe these a better when they're very fresh.  You could ruin dental work if not careful chewing these.  They taste great.
Example Output: 3

Example Input: Maybe my tastebuds are different but I bought this at a local healthfood store and I'm not completely sold on it.  I tried it in my tea and it did leave me w/ an aftertaste...just like most sweetners. *shrugs*
Example Output: 3

Example Input: While I think this product is good, I'm disappointed that they reduced the weight of the product from 18.25 oz to 16.25 oz. Has anyone else noticed how difficult it is to read the type used for the weight, the 6 looks very much like an 8.  Same size box, less product, hmmmm.
Example Output:
1