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 Input: I guess everyone's taste buds are different.  This product didn't work for me.  Every food item tasted as it should :-(
Example Output: 1

Example Input: This is a close second to my all-time favorite, Jack Links Beef Steakhouse Steaks, which is the filet mignon of beef jerky. They're very similar in taste and price, but the Steakhouse edges out this one oh so slightly. Still pretty awesome jerky, very tender, and not a hint of fat or gristle. Bon appetit!
Example Output: 5

Example Input: I've been feeding liver biscotti for years. I was looking for a healthy treat without additives for my epileptic dog (additives can be a seizure trigger) and liver biscotti filled the bill. The ingredients are top-quality. The bite-size bits are perfect for training and don't muck up your pockets. The bite-size portions also make it possible to give rewards without adding pounds, which is a problem with other treats.  And for dogs with wheat and other sensitivities, there is an anti-allergenic recipe. Enthusiastically recommended!
Example Output:
5