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: We just changed to Gerber Good Start Gentle due to sugar in this product.  This did seem to work better than a couple other formula but I decided to try something else when I read about sugar.  We just changed over to Gerber Good Start Gentle and it does (so far) seem to be working better.  He is still gassy but he has less pain and doesnt seem in nearly as much discomfort when eating (he is a little colic but still loves to eat).  I do this this is a good product and I'm sure the sugar is safe, I just would rather not give extra sugar at this age (8 weeks).  Good luck!!
Example Output: 3

Example Input: very good price and we love our keurig trying the summer flavors are great and will probably order more before the end of the summer.
Example Output: 4

Example Input: I have never used Tahini before - and my hummus was good, but always, something was missing... After I found out of Tahini, I ordered it (and it was shipped extremelly fast)and used it. The result was amazing! One spoon into the hummus prepared from one bag (1lb beans) and I had my favorite ready to go!
Example Output:
5