; total time: 0.09
; plan length: 14
(unstack a f)
(stack a d)
(pick-up e)
(stack e f)
(pick-up b)
(stack b a)
(pick-up c)
(stack c b)
(unstack e f)
(put-down e)
(pick-up f)
(stack f c)
(pick-up e)
(stack e f)
