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:
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:
Works great! I have two other similar products and this is by far the most powerful. Especially for the price! Shipping was quick and easy without issue.

Ex Output:
positive

Ex Input:
This adapter is the best one I've come across for plugging in US devices to European two pronged ROUND plugs (be aware-Switzerland uses smaller two pronged adapters). It is really well constructed- not flimsy like many I've used before. The additional USB plugs made it perfect for charging phone and e-reader along with computer. Not the smallest, but it is worth having something that doesn't spark or break in half! Will buy again!

Ex Output:
positive