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 guess there is a reason that the ingredient section on this page doesn't mention that the first ingredient is trans fat (partially hydrogenated oil).  Had I know, I would not have purchased this.  Consumers need to vote with their dollars and avoid buying items where the manufacturer is using cheap and unhealthy ingredients.
Example Output: 1

Example Input: I was introduced to the Blair chips by a friend. I mostly ignore potato chips because I really don't like them. However, these I like the most among all the chips in the Blair line. They are savory and can be eaten rapidly. The hot chips are good because they are so hot, I cannot eat them fast. I am so happy I cannot get them at local stores because I would eat them all the time.
Example Output: 5

Example Input: Used this piece of junk to stuff olives with blue cheese for martinis. After two olives it bacame clear that the Olivator was not up to the task. It's poorly-designed (falls apart) and much slower than stuffing the olives by hand. It cannot handle sticky material like blue cheese and then you have to clean it.
Example Output:
1