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: I want my backstret boys membership back  #BSB
Example Output: negative

Example Input: @emglyph Check out my new promotion.  Amazing what you can do with Photoshop   [Link]
Example Output: positive

Example Input: @billyraycyrus Cool !!! Have a great concert tonight! Uâll ROCK Pa! 
Example Output:
positive