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 bought 21 0z freeze dried liver. Half the container was filled with powder instead of pieces/chunks. I feel I was betrayed by the company. Hence I did not get what I paid for
Example Output: 3

Example Input: OK,I did read the reviews which ranged from splendid to awful. I took the plunge as I do like salty, and tangy flavors. No, I had never had these before I took the leap and ordered a case at a super price. They arrived quickly and in great shape with the sell by date  FEB 2011. Umm, I'm in the middle on these chips, they are OK but not something I can't live without. I love the crunch, the color, NO TRANS FAT. They are a little too vinegary for my taste, which is a lot coming from a kid that grew up eating pickled hard-boiled eggs and pickled pigs feet.  I haven't tried them with a deli sandwich and a cold mug of beer which might improve the experience :)
Example Output: 3

Example Input: I threw my son a baseball themed party for his 1st birthday. What would baseball be without popcorn, peanuts &get crackerjack?! Item was delivered as promised & the packaging was old school, which was appreciated by parents, granparents &the even great grandparents! Item was fresh & taste great!
Example Output:
5