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:
This is a great product, we have made custard with it for years and it always makes great custard. We will purchase this product again. Amazon does a great job of getting us our purchases fast and without damage.

Ex Output:
5

Ex Input:
I have used Pioneer Gravy for a number of years. It is VERY easy to make and tastes great, also. Goes very well over mashed potatoes, meats, etc. Try it!

Ex Output:
5