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: The only reason for the 3 stars was the packets the individual teas were in.  I love this tea, I have the ones in the tin on auto delivery.  I was taking a trip, and ordered these so I could take some with me on my trip.  Prior to leaving home I took some out of the box and put them in my suitcase.  I got to the hotel and tried to open the little packages.  Impossible to open the individual packages.  No knife with me, I ended up using a toe nail clipper to open the individual packages of each tea.  Hopefully this was just a problem with the first box, but I would not recommend buying this tea in the boxes, go for the cannisters.  If you do buy the boxes have something near by to open each and every packet of tea.
Example Output: 3

Example Input: Different flavors for different people.  Not everyone is going to like this just as others, like me, will love this coffee.  It's totally subjective.  I give it 5 stars.  I enjoy this coffee a lot and the price is very reasonable, in my opinion.  It matches my local big box grocery store.
Example Output: 5

Example Input: I bought this because I have celiac disease and was really craving some muffins.  I am not a health nut, I just can't eat gluten.  With that said, this is nasty.  It calls for very little sugar, I figure for the health nuts, so I simply added more sugar since it said to sweeten to taste.  Even with extra sugar, it leaves an extremely bitter taste in your mouth.  I would rather pass on muffins than ever taste something like this again.  On a positive note, the muffins do stay together and look like muffins and if you try the product and dislike it, you can mail in the bottom of the box and your purchase price for a refund.
Example Output:
1