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: For those who love salt and vinegar potato chips, this is the one to choose. The flavor is zippy and tart, with no unpleasant chemical aftertaste like the less "natural" versions of this snack. The 2-ounce bags are just right to share at lunch. The chips are a little greasy, and that's why I've given them 4 stars instead of 5.
Example Output: 4

Example Input: These Backyard BBQ Kettle Chips were a great deal with the promo code.  It was nice to have a larger size bag.  Some Kettle Chips in the grocery store are only about 5 ounces and we polish them off in one family lunch!  They arrived fresh and were not in crumbles as some other chips from Amazon Grocery have been.  Great flavor and All Natural!
Example Output: 5

Example Input: Since it's difficult to explain the taste to you in any realistic and helpful way (A salesperson would tell you different I'm sure). I will just say if it's better, worse, or similar to than some other coffees that I and maybe you have tried. For the most part I would say it tastes like Starbucks coffee. I am not a fan of Starbucks coffee.  * Dunkin Donuts Regular is better. * Starbucks Regular is similar * <a href="http://www.amazon.com/gp/product/B001EQ4F14">Folgers Classic Roast Instant Coffee, 4-Ounce Jars (Pack of 6)</a> is worse * <a href="http://www.amazon.com/gp/product/B000SDKDM4">Lavazza Super Crema Espresso Whole Bean Coffee, 2.2-Pound Bag</a> is better * <a href="http://www.amazon.com/gp/product/B001E5E0R4">Melitta Classic Premium Blend Medium Roast Ground Coffee, 23-Ounce Cans (Pack of 2)</a> is better * <a href="http://www.amazon.com/gp/product/B000BXMAWM">New England Coffee 100% Colombian Supremo, Coffee, 11 oz</a> is better * Whatever the heck they serve at my work is worse
Example Output:
3