C11112331312111112111133133313331333132323213331333133313331311331122212111   >>    C1111233131211111211113313331333133313232321333133313331333131133112221211   <<    C11112331312111112111133133313331333132323213331333133313331311331122212113   >>      C11112331312111112111133133313331333132323213331333133313331311331122212112   >>