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: This mix makes GREAT belgian waffles.  We tried biscuits and pancakes and we do far better form scratch with a standard GF flour.  It does make seriously great waffles though, and we go GF/DF on these.  The waffles freeze extremely well and reheat in the toaster quite nicely.
Example Output: 3

Example Input: I loved this product, and it was better than what I thought it was going to be. My favorite was teh salt and vinger flavor (yum yum) but I hated the cheddar, and salt & pepper ones.
Example Output:
4