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 don't know why this flour isn't available in grocery stores in the Midwest.  Typical grocer flours have a protein content much too high to give an authentic taste to such foods as pizza crust and homemade pastas.  And after years of making homemade pastas and trying to find that perfect recipe that would result in those served in the best Italian restaurants in the US and Europe, I'm happy to discover, the secret was in the 00 protein content all along.  What a fabulous difference this flour makes!  Freezes well too.

Ex Output:
5


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:
okay, it's freeze-dried liver cube-lets.  my common sense tells me that for a lot less than the price of this treat i could buy real liver, cube it and freeze it.  it would serve the same purpose for a lot less money, and it would not be over-processed. that said, our dog would do back flips for this treat, so if you're made of money, go ahead.  you'll make your dog's day  :-)

Ex Output:

2