7 6
(0,1) (2,3) (4,5) 
(0,2) (4,6) (1,5) 
(0,6) (2,5) (1,3) 
(2,6) (1,4) (3,5) 
(2,4) (0,3) (5,6) 
(3,4) (1,6) (0,5) 
(3,6) (1,2) (0,4) 
nodes: 73716   cpu: 600173
0: F F F B M L L  changes: 1
1: F L L M B M M  changes: 1
2: M F M F F B M  changes: 1
3: M B L L M F F  changes: 1
4: L M B M F F L  changes: 1
5: L L M L L L E  changes: 0
6: B M F F L M F  changes: 1
total boat changes: 6