C11112331312111112111133133313331333133313223223313121111331311221123231111   >>    C1111233131211111211113313331333133313331322322331312111133131122112323111   <<    C11112331312111112111133133313331333133313223223313121111331311221123231113   >>      C11112331312111112111133133313331333133313223223313121111331311221123231112   >>