What is the missing line?

>>> myDeque = deque('dog')
_____
>>> myDeque
deque(['d', 'o', 'g', 'cat'])

>>> myDeque.insert('cat')
>>> myDeque.insert('cat')

>>> myDeque.appendleft('cat')
>>> myDeque.appendleft('cat')

>>> myDeque.append('cat')
>>> myDeque.append('cat')

>>> myDeque.appendright('cat')
>>> myDeque.appendright('cat')