C11112331312111112111133133313331333132323213331333131333131133112121121   >>    C1111233131211111211113313331333133313232321333133313133313113311212112   <<    C11112331312111112111133133313331333132323213331333131333131133112121123   >>      C11112331312111112111133133313331333132323213331333131333131133112121122   >>