C312312111111331312111133133313331331121111331333133313232233223331   >>    C31231211111133131211113313331333133112111133133313331323223322333   <<    C312312111111331312111133133313331331121111331333133313232233223333   >>      C312312111111331312111133133313331331121111331333133313232233223332   >>