----
(0,a,r),(2,b,r),(3,c,r),(2,c,w),(3,b,r),(1,b,w)
(2,b,r),(2,c,w),(3,c,r),(3,b,r),(1,b,w),(3,a,w),(0,a,r)
(0,a,r),(3,c,r),(3,b,r),(1,b,w),(2,b,r)
(0,a,r),(1,b,w),(2,b,r),(3,c,r),(3,b,r)
(0,a,r),(2,b,r),(1,b,w),(3,c,r),(2,c,w),(3,b,r)
(0,a,r),(2,b,r),(1,b,w),(2,c,w),(3,c,r),(3,b,r)
(0,a,r),(2,b,r),(2,c,w),(3,c,r),(3,b,r),(1,b,w),(3,a,w)
----
