C312312111133131212111133133313231333133313223313232213132313111   >>    C31231211113313121211113313331323133313331322331323221313231311   <<    C312312111133131212111133133313231333133313223313232213132313113   >>      C312312111133131212111133133313231333133313223313232213132313112   >>