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: This is the worst thing I ever bought from amazon. It's mask was of mediocre quality, the plastic started melting away. And to top all that internal wiring seemed to have been short circuiting or something and after a strange sound, the whole thing stopped working. Worst of all, no return policy.
Output:
1