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: starting a new diet/fitness plan tomorrow, it's gonna be rough. Starts with a 2 day fast. Think of me tomorrow while you eat 
Example Output: negative

Example Input: @riannesketch aha, yay!  i was always a duncan girl ;D omgosh, we're just too cool ;P x
Example Output: positive

Example Input: So disappointed about Ferrari..see..RedBull is running without the diffuser so far ahead to Ferrari.. 
Example Output:
negative