C11112331312111112111133133313331333133311222121111113313331122112323311   >>    C1111233131211111211113313331333133313331122212111111331333112211232331   <<    C11112331312111112111133133313331333133311222121111113313331122112323313   >>      C11112331312111112111133133313331333133311222121111113313331122112323312   >>