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: Neat concept. Other contraptions to use your own coffee have prepunched holes and are designed much differently than the K-Cup. This is like a do it yourself K-Cup. However, because this consists of a disposable cup, filter, and a cap and is punched by the brewer, I would not be surprised if this mechanism infringed on Keurig's patents. Oh, and the video review submitted by the other reviewer looks suspiciously like the video on the manufacturers website :)
Example Output: 3

Example Input: For those of us with celiac disease this product is a lifesaver and what could be better than getting it at almost half the price of the grocery or health food store!  I love McCann's instant oatmeal - all flavors!!!  Thanks, Abby
Example Output: 5

Example Input: Holy cow!  I have never seen this much grease in a boxed product like this!  Also, it has enough salt to kill an entire family of slugs!  Use it in your garden, don't eat it!
Example Output:
2