C11112331312111112111133133313331333133313223223313121111112123221   >>    C1111233131211111211113313331333133313331322322331312111111212322   <<    C11112331312111112111133133313331333133313223223313121111112123223   >>      C11112331312111112111133133313331333133313223223313121111112123222   >>