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. 

Ex Input:
I keep this on hand for the young at heart.  We enjoy a cup almost every night.  Good taste.  will buy again.

Ex Output:
5


Ex 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

Ex Output:
3


Ex Input:
I was introduced to this sauce by a good friend of mine from Cambodia, who runs a Thai restaurant and bar.  I wondered what sauce was used in their ramikens when they served their delicious crispy spring rolls.  Their actual sauce was handmade, but I was directed to try this brand.  Since then, (about 5 yrs ago) my mother, friends, and I have all used this sauce on fried chicken wings, grilled and sauteed chicken, pork, spring/egg rolls, and even sushi!  I keep the large 25 oz bottle in my fridge year-round, and this is the best brand I've used thus far.  Not too hot for those not accustomed to very spicy foods, but is mostly sweet.  Try it, you won't be disappointed!! :o)

Ex Output:

5