C1111233131211111211113313331333133313232212111133131133133311312112211231   >>    C111123313121111121111331333133313331323221211113313113313331131211221123   <<    C1111233131211111211113313331333133313232212111133131133133311312112211233   >>      C1111233131211111211113313331333133313232212111133131133133311312112211232   >>