Definition: 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.
Input: I like the Kumon method so I bought many Kumon books. Unfortunately the Kumon word problems series is very poorly designed. For every page, the first problem is good but it has an example solution. The rest of the problems have almost exactly the same pattern (with different numbers), thus kids do not even need to read the question carefully, but just follow the pattern and fill in different numbers. Therefore this book is not much useful. A good word problem book should lead kids to think about every question and find out the proper solution. There are patterns among word problems, but the book should not have made it so obvious that kids do not need to think at all.
Output:
2