text: from typing import Optional
  import os
  
  class BlueDolphin(object):
      def __init__(self, blue: str, dolphin: str):
          self.blue = blue,
          self.dolphin = dolphin
      
      @staticmethod
      def blue_dolphin(r):
          added_nums = []
          for i in range(r):
              added_nums.append((lambda x: x + 1)(i))
          if not added_nums:
              return False
          return True
  
      def blue_dolphins(self, times):
          print((self.blue + self.dolphin) * times)
  
  
  if __name__ == "__main__":
      blue_dolphin = BlueDolphin("blue", "dolphin")
      blue_dolphin.blue_dolphin(21)
      blue_dolphin.blue_dolphins(21)
  