-er c-- ccc ccd cce ccf ccr cct ccu cdc cdd cde cdf cdr cdt cdu ce- cec ced cee cef cer cet ceu cfc cfd cfe cff cfr cft cfu crc crd cre crf crr crt cru ctc ctd cte ctf ctr ctt ctu cuc cud cue cuf cur cut cuu dcc dcd dce dcf dcr dct dcu ddc ddd dde ddf ddr ddt ddu de- dec ded dee def der det deu dfc dfd dfe dff dfr dft dfu drc drd dre drr drt dru dtc dtd dte dtf dtr dtt dtu duc dud due duf dur dut ec- ecc ecd ece ecf ecr ect ecu ed- edc edd ede edf edr edt edu eec eed eee eef eer eet ef- efc efd efe eff efr eft erc erd ere erf err ert eru etc etd ete etf etr ett etu eu- euc eud eue euf eur eut fcc fcd fce fcf fcr fct fcu fdc fdd fde fdf fdr fdt fdu fec fed fee fef fer fet feu ffc ffd ffe fff ffr fft ffu frc frd fre frf frr frt fru ftc ftd fte ftf ftr ftt ftu fud fue fuf fur fut fuu rcc rcd rce rcf rcr rct rcu rdc rdd rde rdf rdr rdt rdu re- rec red ree ref rer ret reu rfc rfd rfe rff rfr rft rfu rrc rrd rrf rrr rrt rru rtc rtd rte rtf rtr rtt rtu ruc rud rue ruf rur rut ruu tcc tcd tce tcf tcr tct tcu tdc tdd tde tdf tdr tdt tdu te- tec ted tee tef ter tet teu tfc tfd tfe tff tfr tft tfu trc trd tre trf trr trt tru ttc ttd tte ttf ttr ttt ttu tuc tud tue tuf tur tut tuu ucc ucd uce ucf ucr uct ucu udc udd ude udf udr udt udu uec ued uee uef uer uet ufc ufd ufe uff ufr uft ufu ur- urc urd ure urf urr urt uru utc utd ute utf utr utt utu uuc uue uur uut uuu