class Cat:
   def __init__(self,name,age,color):
      self.name = name
      self.age = age
      self.color = color

   def sleep(self):
      return 0

   def eat(self):
      return 0

   def scratch(self):
      return 0

   kitty = Cat('kitty',3,'black')
   spot.sleep()


class Dog:
   def __init__(self, name, age, breed):
      self.name = name
      self.age = age
      self.breed = breed

   def pee(self):
      return 0

   def breath(self):
      return 0

   def run(self):
      return 0

if __name__ == '__main__':
   spot = Dog('spot',3,'Welsh Corgy')
   spot.pee()

   grey = Dog('grey',5,'mutt')
   grey.run()