text: #! /usr/local/bin/python
  
  import sys
  
  # if __name__ == "__main__":
  # 	for line in sys.stdin:
  # 		sys.stdout.write("DEBUG: got line: " + line)
  
  script, main_file_path, child_file_path = sys.argv
  # sys.stdout.write(str(sys.argv))
  
  # exit(0)
  
  # main_file_path = 'main_styles.css'
  # child_file_path = 'cart_styles.css'
  
  
  def get_styles(file_path):
  	file = open(file_path).read()
  	items = [(i + '}').strip() for i in file.split("}")]
  	return items
  
  main = get_styles(main_file_path)
  child = get_styles(child_file_path)
  
  new = [i for i in child if not i in main]
  res = "\n".join(new)
  sys.stdout.write(res)