C1111233133313231133133313331333133311221123121111331311331323133313123231211   >>    C111123313331323113313331333133313331122112312111133131133132313331312323121   <<    C1111233133313231133133313331333133311221123121111331311331323133313123231213   >>      C1111233133313231133133313331333133311221123121111331311331323133313123231212   >>