Given the task definition, example input & output, solve the new input case.
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.
Example: I have bought several of the Vitality canned dog food products and have found them all to be of good quality. The product looks more like a stew than a processed meat and it smells better. My Labrador is finicky and she appreciates this product better than most.
Output: 5
The user really seem very satisfied with the product and gave good review worthy of 5 stars rating.

New input case for you: I was quite excited to try this product, so I bought 4 packs. We opened one, and I tested a half-tablet. No result. My wife tried the other half. Ditto. The next day, we tried a full tablet, letting it completely dissolve over the entire tongue. I found the tablets pretty tasty themselves, while my wife found them too chalky to enjoy. Anyway, again there was no effect with lemons, chili sauce, etc. Our daughter also had no discernible change in her taste of foods. Happily for me, the company is going to refund me for the other three packages. But I would have preferred that they'd worked. I was looking forward to bringing them out at an upcoming party.
Output:
1