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 these for my son to take to work for lunch. Apparently his co-workers found the smell so offensive they asked him not to eat it at work again. Maybe it was a bad batch...
Example Output: 1

Example Input: Maybe these a better when they're very fresh.  You could ruin dental work if not careful chewing these.  They taste great.
Example Output: 3

Example Input: I bought this for Christmas and gave a few away as gifts.  You get a bunch of boxes, but if you love bacon, there are a lot of uses for it!  I've made sour cream chip dip, cheese balls, added to mashed potatoes and mac & cheese, sprinkled on baked potatoes in place of bacon bits.  If you can dream it you can do it.  The bacon flavor is not over powering, it is a subtle delicious taste.  I love Davis & Davis products and will be trying different varieties for sure.
Example Output:
5