C11112331312111112111133133313331333133311222121133131133132213111   >>    C1111233131211111211113313331333133313331122212113313113313221311   <<    C11112331312111112111133133313331333133311222121133131133132213113   >>      C11112331312111112111133133313331333133311222121133131133132213112   >>