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:
It was bad before we open them. I saw them when we got. I did open. It had some spot green color. I did not know what it was. I was very upset. Do not buy this product.

Ex Output:
1


Ex Input:
I previously tried other matcha products and was generally satisfied with the quality but not the price.  I decided to give Pure Matcha green and rooibos a try because the price seemed to be very competitive.  The quality of Pure Matcha's products surpasses that of all others I have tried- stays fresh, has a consistent texture and tastes great.  Both the quality and price are better than others that I have purchased for the same quantity.  I highly recommend Pure Matcha and will continue to purchase.

Ex Output:
5


Ex Input:
Amazon's suggestion for a 4 star review is "I like it."  That being said, I gave a 5 star review to the Spicy Thai chips.  These chips are perfect for people that enjoy a spicy chip, but whose taste buds don't appreciate the added sweetness and ginger flavor.  The only thing I REALLY dislike about these chips (along with the rest of the flavors) is that the serving size is HALF the bag.  Really?  Who can eat half and save the rest for later???  Not me...

Ex Output:

4