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. 

Ex Input:
This product smells so bad that I couldn't even try to consume it.  It smells sour and rancid and is detectable even before the package was opened.  The seller has a no return policy so I'm out the $ I spent on this as it will go right into the garbage.

Ex Output:
1


Ex Input:
These chips are the only ones I found to be tasty and healthy. They have fewer fat calories plus higher fiber for those who want good taste and nutrition--the perfect blend!

Ex Output:
4


Ex Input:
I have two medium-sized dogs, and these are a real bargain, but only keep them busy for about 15 minutes. Next time I will get the larger size.

Ex Output:

3