C11112331312111112111133133313331333132323213331333131133232232321   >>    C1111233131211111211113313331333133313232321333133313113323223232   <<    C11112331312111112111133133313331333132323213331333131133232232323   >>      C11112331312111112111133133313331333132323213331333131133232232322   >>