C1111233133313231133133313331333133311221123121111331333131133212121   >>    C111123313331323113313331333133313331122112312111133133313113321212   <<    C1111233133313231133133313331333133311221123121111331333131133212123   >>      C1111233133313231133133313331333133311221123121111331333131133212122   >>