C312312111111331312111133133313331333133313232233133313331233121   >>    C31231211111133131211113313331333133313331323223313331333123312   <<    C312312111111331312111133133313331333133313232233133313331233123   >>      C312312111111331312111133133313331333133313232233133313331233122   >>