C312312111111331312111133133313331333133313232233133313231333133312111   >>    C31231211111133131211113313331333133313331323223313331323133313331211   <<    C312312111111331312111133133313331333133313232233133313231333133312113   >>      C312312111111331312111133133313331333133313232233133313231333133312112   >>