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 had a second plant to replace the first one. it to came in sad shape, i should of went to a local nursery at least then i would of got a good plant. dont waste your time with this vender.
Example Output: 1

Example Input: While the product is delicious, it's annoying that the peanut butter stays on the waxy paper instead of on the product. You need a fork to scrape the peanut butter off the protective top sheet.
Example Output: 1

Example Input: Terrible! I cannot believe this, I received this item and EVERY SINGLE BAG WAS OPENED BUT 4!!!! I'm stationed in Afghanistan and this was gonna be a snack for my team while going out on missions. I was so embarrassed when the bags were opened and spilt out all in the box, gross! And the box is filled with grease stains. Idk if it was from the airplane ride all the way here, but the box should have been more insulated and bubble wrap should have been used instead of paper. I'm very unhappy with stale crusty chips out the bag and us soldiers cannot enjoy now.
Example Output:
1