>>> from drunken_knight import drunken_knight

--ini

>>> l = [3, 2, 0, 1]
>>> drunken_knight(l, 3)
>>> l == [-1,-1,-1,-1]
True

>>> l = [1, 2, 3, 4]
>>> drunken_knight(l, 0)
>>> l == [-1,-1,-1,-1]
True

>>> l = [2, 3, 4, 3, 0]
>>> drunken_knight(l, 2)
>>> l == [-1, 3, -1, 3, -1]
True

--fi