C11112331312111112111133133313331333133313331333133313331211113313232223213331   >>    C1111233131211111211113313331333133313331333133313331333121111331323222321333   <<    C11112331312111112111133133313331333133313331333133313331211113313232223213333   >>      C11112331312111112111133133313331333133313331333133313331211113313232223213332   >>