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.

Ex Input:
Really good construction, not the usually cheap plastic feel. I love the multiple colors on each truck. The return mechanism is really nice and fun. It's a must buy for every child!

Ex Output:
positive

Ex Input:
Slips off of my glasses after few hours time. They should grip and stay but they just fall right off and I have to keep putting it back on my glasses.

Ex Output:
negative

Ex Input:
It is an amazing idea for those who wants to replace plastic straws for something reusable. I bring it with me every time I go out so I don't need to get plastic straws anymore.

Ex Output:
positive