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 ordered this as a christmas present for my Daughter and Son in law. He tried it the day after Christmas and gave it 2 thumbs up.
Example Output: 5

Example Input: Maybe my tastebuds are different but I bought this at a local healthfood store and I'm not completely sold on it.  I tried it in my tea and it did leave me w/ an aftertaste...just like most sweetners. *shrugs*
Example Output: 3

Example Input: I had to try this Orange Tangerine flavor because I had tried the watermelon/strawberry and didn't like it very much, but wanted to give this company another shot. I do prefer this Orange tangerine; it has a nice citrus flavor with that carbonated fizzy on the tongue sensation. I give it a 3, better then the watermelon/strawberry and on ice I drank the whole can.
Example Output:
3