cycle_node_only=[1, 2, 3]
cycle_with_depth_limited=[(1, 0), (2, 1), (3, 2), (1, 3), (2, 4), (3, 5), (1, 6), (2, 7)]
cycle_path_safe=[(1, 0, ',1,'), (2, 1, ',1,2,'), (3, 2, ',1,2,3,')]
diamond_paths_to_4=[',1,2,4,', ',1,3,4,']
delimiter_nodes=[1, 11]
PASS checks=5
