In this task, you are given a text from tweets. Your task is to classify given tweet text into two categories: 1) positive, and 2) negative based on its content.

Example Input: @MedifastPr Btw I lost 17lbs on Medifast. Its helped me alot. And I love what I'm eating...that's very important to me: Gotta be TASTY 
Example Output: positive

Example Input: How time flys...this is it - TWEAT #500...back to business now that that milestone is over 
Example Output: positive

Example Input: ahh, i have to pack  but i got a new phone and my permit, (: yayyy!
Example Output:
negative