Definition: In this task, You are given a review of Amazon's food products. Your task is to divide them into two classes: negative or positive, depending on the content of the review.
Input: I was very happy to receive the goods. It was very good on the grade. It was especially suitable after installation. The picture was clear, the operation was simple and easy to understand. I didn't let me down. The last one was not clear. There is no problem with this. Very good, cost-effective is still very high, recommended to buy, all praise service is very thoughtful.
Output:
positive