求电脑程序的问题

def move_big_joker_value(deck):
''' (list of int) -> NoneType
Moving the big joker two cards down the deck. Treat the deck as circular.
>>>deck = [10, 12, 11, 8]
>>>move_big_joker_value(deck)
>>>deck
[10, 11, 8, 12]
>>>deck = [1, 2, 3, 4, 5]
>>>move_big_joker_value(deck)
>>>deck
[2, 5, 3, 4, 1]
'''
求return的内容