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: most of the nuts in these bags were so old they had turned black totally worthless will never order again
Example Output: 1

Example Input: For those with gluten allergies, this is great. The shortcakes, biscuits, pancakes taste much the same as with the regular Bisquick. My only problem with it is that it comes in such a small size. Would love for them to box it in larger sizes.
Example Output: 5

Example Input: I really like this flavoring. I try to stay away from sugar and artificial sweeteners so this was perfect because it contains absolutely no sweetener so I can add my own (mostly liquid stevia).  I also love vanilla flavoring in many things I make so I sometimes use this in place of extract which can be pricey if you use it a lot. For example, I make my own almond milk so I like to add vanilla to sweeten and lighten the taste. This works better than an extract because there is no alcohol taste. I also make blueberry syrup with agave and this flavoring and it turns out very good. I put it in pancake batter and the flavor still holds after cooking (also with cookies). I use this all the time and now I am not dropping $10 every couple of weeks for vanilla extract.
Example Output:
5