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:
Very difficult to work with - tends to turn to solid rock even when following directions - taste is less than desirable

Ex Output:
2


Ex Input:
Not bad, but there are better gums than this one. At the beginning is a big explosion of flavor and sugar like sensation, but after 5 minutes is gone.

Ex Output:
3


Ex Input:
Having eaten (and re-eaten) my way though all of the DAS caramel range, this remains my all-time favorite, and the one that usually gets the most rave reviews when I share them (which isn't an easy thing to do - just try one and you'll see what I mean).  I've been a caramel fan for ages, and while Werthers Butterscotch will do in a pinch, nothing has come closer to what my mother used to make than these.  They are chewy, buttery, and the little crunches of salt are spectacular (OK my mother didn't put salt in hers, this is an improvement).

Ex Output:

5