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 good price and we love our keurig trying the summer flavors are great and will probably order more before the end of the summer.

Ex Output:
4


Ex Input:
I love, and use the empty containers for medicine/advil in my purse, desk, suitcase. Also line with felt to keep earrings. Perfect little size to disguise small valuables when traveling and LOVE the mints. Tiny and powerful without burning my mouth.

Ex Output:
5


Ex Input:
My dogs have been enjoying these treats for years and we've ordered this many times from Amazon in the past.  However, our last order was a big disappointment.  The description of exactly how much of this product you will receive is very unclear, so when I saw that the product weight is 4.2 lbs and the shipping weight is 4.6 lbs., naturally I expected to receive a minimum of three one pound bags (as we have in the past).  Not so.  Amazon outrageously charged us $41.00 for a single one pound bag of dried lamb lungs.  You'd think I was buying caviar!  The treats were promptly packed back up and returned.  Tsk, tsk, tsk, Amazon :(  So, 5 stars for the product itself.  0 stars for Amazon this time.

Ex Output:

2