C11112331312111112111133133313331333132322121111331333112233231   >>    C1111233131211111211113313331333133313232212111133133311223323   <<    C11112331312111112111133133313331333132322121111331333112233233   >>      C11112331312111112111133133313331333132322121111331333112233232   >>