C312312111133131212111133133313231333133313223313232221123232311   >>    C31231211113313121211113313331323133313331322331323222112323231   <<    C312312111133131212111133133313231333133313223313232221123232313   >>      C312312111133131212111133133313231333133313223313232221123232312   >>