(1,head,head),(1,head,tail),(1,tail,head),(1,tail,tail)
(2,head,head), (2,head,tail),(2,tail,head),(2,tail,tail),
(3,head,head), (3,head,tail),(3,tail,head),(3,tail,tail),
(4,head,head), (4,head,tail),(4,tail,head),(4,tail,tail),
(5,head,head), (5,head,tail),(5,tail,head),(5,tail,tail),
(6,head,head), (6,head,tail),(6,tail,head),(6,tail,tail),