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: Is scared but excited about this next BIG step he's about to take. Hope it works out. 
Example Output: positive

Example Input: think i have swine flu 
Example Output: negative

Example Input: Oh God The Iron Giant makes me so sad 
Example Output:
negative