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 just bought the Emril k-cups and have used about 12 of them and half if them exploded in my kurig machine.  It was such a pain and waste of money because I enddd up throwing them away and using. another k-cup because the coffee was full of grindes.  And I cant even write to the seller yo complain!
Example Output: 1

Example Input: I thought this coffee was really horrible. Had one cup and will throw the rest away because it can't be returned.
Example Output: 1

Example Input: Shipping great and loved product. The boxes are a little tough because there is not a lid if you do not finish.  I suggest buy only little ones this way.
Example Output:
5