C11112331312111112111133133313331333133311222121111132213233121   >>    C1111233131211111211113313331333133313331122212111113221323312   <<    C11112331312111112111133133313331333133311222121111132213233123   >>      C11112331312111112111133133313331333133311222121111132213233122   >>