Schemes of sequential pure 4-opt moves

All sequential pure 4-opt moves

Move 12-78-34-65	Move 12-87-34-65	Move 12-56-34-87
Move 12-87-56-34	Move 12-56-87-34	Move 12-65-34-87
Move 12-65-78-34	Move 12-78-65-34	Move 12-43-78-56
Move 12-43-87-56	Move 12-78-43-56	Move 12-87-43-56
Move 12-43-65-87	Move 12-43-78-65	Move 12-87-43-65
Move 12-56-43-87	Move 12-56-87-43	Move 12-78-56-43
Move 12-65-78-43	Move 12-65-87-43