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.

Example Input: I have very hard water where I live. I use this once or twice a week and it really helps remove the build up on my hair. I'll definitely keep using this.
Example Output: positive

Example Input: I bought these to use around the house instead of carpet slippers as they were making my feet sweat, and after being in work boots all day a bit of fresh air would not go a miss.
Example Output: positive

Example Input: The clubs might be great, but we will never know! We ordered the MEN's 16 piece Callaway set for our son for Christmas, but received the WOMEN's 11 piece set in error. We sent it back to get the correct MENS set, and within two days we received the replaced package. Only to open it and find the same WOMEN's 11 piece set AGAIN! We have sent it back again for a replacement ... hopefully the 3rd time is a charm!!
Example Output:
negative