C11112331312111112111133133313331333133311222121111121111133223312231   >>    C1111233131211111211113313331333133313331122212111112111113322331223   <<    C11112331312111112111133133313331333133311222121111121111133223312233   >>      C11112331312111112111133133313331333133311222121111121111133223312232   >>