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: This tea tastes almost as good as the tea you would get at an Indian restaurant. It's much better than getting a teabag and making it the English way, with a lot of water and a bit of milk. This is very creamy and tasty. My only criticism is that there aren't enough sachets in the box. Only 10. Since the directions say that you use one sachet for 100ml of water (approximately half a cup), it's not enough for a good cup of tea, so I use two. That means that one box is only good enough for five cups of tea. But it's a delicious after-dinner drink! I would buy this again if there were more sachets in a box.
Example Output: 5

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: These chips are VERY GOOD!! I couldn't stop eating them. They didn't last very long.  The reason I gave them 4 stars, instead of 5, is because I think the bags are a little hard to open. I'm not sure why they need to make a potato chip bag that sturdy, you may need some scissors on hand to open them much easier.
Example Output:
4