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: I purchased these because they do not contain dairy, soy or corn.  Well, in addition to being dairy free, soy free.... they are FLAVOR FREE!  Absolutely horrible dry tasting bars.  First words out of my mouth were "tastes like dirt" so that's what I'm going with.  DO NOT WASTE YOUR MONEY.
Example Output: 1

Example Input: These are the worst gluten free cookies I have ever tasted.  They were hard, dry and tasted like tapioca flour.  Avoid these at all cost.
Example Output: 1

Example Input: I had to pick up a grocery store brand after running out of our regular Innova dog food. I fed this to my 160lb dog for a week and could not believe the amount of waste this brand produced! He was going up to 10 times a day! Unbelievable! This just goes to show how much filler is in this food. Would never recommend.
Example Output:
1