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:
I purchased in June and hired an HVAC professional to install. After several calls to Nest support, it was determined that we had a faulty plate so we attempted to install the 2nd and again after several calls and a couple of hours, determined that that one wouldn't hold its charge long enough to install. In both cases, the window to return them had lapsed so I am out of $400 plus and then had to buy a regular thermostat to boot! Lesson here, do not buy this product until you are ready to install it!

Ex Output:
negative


Ex Input:
Bought this after reading good reviews. But it’s not water proof at all. If my son has even a little accident in bed, it goes straight to mattress. I don’t see a point in having this. So I have to purchase another one.

Ex Output:
negative


Ex Input:
I ordered before a trip where I wasn't planning to check my bag. These bottles are AWESOME! They definitely surpassed my expectations They are the perfect size and the quality is so much better thank I was expecting. I had so issues with security and no leaks. Win. Recommend these to any traveler!

Ex Output:

positive