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: Thought this might be a nice alternative to use with my favorite coffee, but was sadly disappointed.  It leaked all over - no matter what we tried and the coffee was weak, machine clogged with most attempts and water wouldn't brew thru.  At times the cup even melted a little - leaving a nasty taste in the coffee.  Go with the greener alternative and try the ekobrew - much better results and no waste.
Example Output: 2

Example Input: We bought these chips at a little sandwich shop in Sonoma while we were on vacation. I wasn't sure what to expect by the package, and at first bite I didn't know what to think...and then all of the flavors hit! Yum! They are a bit spicy, but nothing overpowering. Just lots of crunchy, sweet, spicy goodness. They aren't sold everywhere though, I'm still trying to find them somewhere close to where I live.
Example Output: 5

Example Input: Delicious chocolate cups, each in its own aluminum holder.  I could not find these in any local store, so was happy to find them on-line. Most people are unaware of them, so they are impressed when I serve them a little cordial or other liquor in a chocolate cup.  After sipping the liquor, you can eat the cup.  What could be nicer?  Excellent product.
Example Output:
5