Thử thách tìm lỗi vi phạm

from abc import ABC, abstractmethod

class animal(ABC):
    @abstractmethod
    def makeVoice(self):
        pass

class red_tiger(animal):
    def __init__(self, VOICE):
        self.Voice = VOICE
    
    def makeVoice(self):
        print(self.Voice)

defaultvoice = "Woof"

if __name__ == "__main__":
    defaultTiger = red_tiger(defaultvoice)
    realTiger = red_tiger("Arrgh!")
    defaultTiger.makeVoice()
    realTiger.makeVoice()