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 have subscribed these chips. They are so tasty. Not dry or oily. Cannot put it down once open a bag and have to have two bags in a row.

Ex Output:
5


Ex Input:
My honey has a serious sweet tooth, which I accommodate by preparing him a weekly dessert. Martha White's Muffin Mix is very convenient to prepare because it only requires one-half cup of milk, which I toss into my cuisinart; and wah-la six beautiful muffins with virtually no prep time. They are moist, delicious, and economic.

Ex Output:
5


Ex Input:
Product is exactly as advertised.  What a savings!  At least half the retail price. Easy to store because of the individual packaging.

Ex Output:

5