In this task, you're given a review from Amazon. 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, 4: good, 5: extremely good.

Example Input: I like the fact that the music is battery powered! No winding like the old days! Also, you can put music on an SD card and play it in addition to what comes preloaded. Looking forward to using it!
Example Output: 5

Example Input: I don't usually read too often but, decided to start reading from a list of top 10 books for leaders. I saw this in a TED talk and just had to read it. I am about half way through and Simon's insights are very useful.
Example Output: 4

Example Input: After having this case for only a few weeks, the corners started to crack. I am not hard on my laptop, so I am unsure how or why they cracked. They were so bad that the case would not stay on by itself anymore. Very disappointing.
Example Output:
2