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:
most of the nuts in these bags were so old they had turned black totally worthless will never order again

Ex Output:
1


Ex Input:
Newman products have been used in our home for years. After researching Newman's Adult Dog food I felt confident in giving the food to our two cocapoo's. They love it! One of them wolfs it down in 4 seconds! Really, I timed it. With so many companies recalling dog foods,I felt the Newman company being organic would be more reliable. Keeps me from worrying so much as I pour that bowl of food for them.

Ex Output:
5


Ex Input:
Vanilla flavor is barely noticeable.  Acidic taste, not at all what I expected.  Breakfast in Bed and Hawaiian Hazelnut are much better choices.

Ex Output:

2