C11112331312111112111133133313331333133311222121111113313331122333131231   >>    C1111233131211111211113313331333133313331122212111111331333112233313123   <<    C11112331312111112111133133313331333133311222121111113313331122333131233   >>      C11112331312111112111133133313331333133311222121111113313331122333131232   >>