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:
most of the nuts in these bags were so old they had turned black totally worthless will never order again

Ex Output:
1


Ex Input:
I love the flavor that this hot chocolate has.  It is very rich and smooth.  Have tried other brands but did not get the results I wanted.  I will definately be ordering from this company again.

Ex Output:
5


Ex Input:
although this isn't a perfect cup of cocoa, it's far superior to the others that i have tried. i will order this again.

Ex Output:

4