C11112331312111112111133133313331333132323213331333131211113311221123231   >>    C1111233131211111211113313331333133313232321333133313121111331122112323   <<    C11112331312111112111133133313331333132323213331333131211113311221123233   >>      C11112331312111112111133133313331333132323213331333131211113311221123232   >>