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:
I love little white kernels of popped corn.  This was good stuff, but I think I'll try a larger white kernel to pop next time, my preference.

Ex Output:
4


Ex Input:
I used the small cup setting and even opened up the cap and scraped the excess mix out of the cup and it is still very weak tasting.

Ex Output:
2


Ex Input:
Since I've had my Keurig K-cup coffee brewer I have never had such horrible coffee!  Tastes like cardboard!  I usually get either donut shop k cups or Paul Neuman's Own.  Also Midnight Express, ALL good.  But this Morning Blend junk isn't ANY good at all.  Never again!

Ex Output:

1