[NULL]
[1]
[NULL,3]
[]	\N
[1]	1
[NULL,3]	\N
[NULL,3]	3
[(0,'',NULL)]
[(0,'0',0)]
[(0,'0',0),(1,'1',NULL)]
[(0,'',NULL)]
[(0,'0',0)]
[(0,'0',0),(1,'1',NULL)]
[(0,'',NULL)]
[(0,'0',0)]
[(0,'0',0),(1,'1',NULL)]
[(0,'',NULL)]
[NULL]
['1']
[NULL,'3']
[NULL]
['1\0\0']
[NULL,'3\0\0']
['3\0\0','4\0\0','5\0\0']