Given the task definition and input, reply with output. 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.

Small but powerful. I was pleasantly surprised to see this heater provide heat for my office space. Its adjustable thermostat works perfect and its amazing how quickly it heats up. This space heater warmed everyone next to me and myself all day. I highly recommend for everyone.
positive