-er c-- ccc ccd cce cco ccr cct ccu cdc cdd cde cdo cdr cdt cdu ce- cec ced cee ceo cer cet ceu co- coc cod coe coo cor cot cou crc crd cre cro crr crt cru ctc ctd cte cto ctr ctt ctu cuc cud cue cuo cur cut cuu dcc dcd dce dco dcr dct dcu ddc ddd dde ddo ddr ddt ddu de- dec ded dee deo der det deu doc dod doe doo dor dot dou drc drd dre dro drr drt dru dtc dtd dte dto dtr dtt dtu duc dud due duo dur dut ec- ecc ecd ece eco ecr ect ecu ed- edc edd ede edo edr edt edu eec eed eee eeo eer eet eo- eoc eod eoe eoo eor eot eou erc erd ere ero err ert eru etc etd ete eto etr ett etu eu- euc eud eue eur eut oc- occ ocd oco ocr oct ocu odc odd ode odo odr odt odu oec oed oee oeo oer oet oo- ooc ood ooo oor oot or- orc ord ore oro orr ort oru ot- otc otd ote oto otr ott otu ou- ouc oud oue ouo our out rcc rcd rce rco rcr rct rcu rdc rdd rde rdo rdr rdt rdu re- rec red ree reo rer ret reu roc rod roe roo ror rot rou rrc rrd rrr rrt rru rtc rtd rte rto rtr rtt rtu ruc rud rue ruo rur rut ruu tcc tcd tce tco tcr tct tcu tdc tdd tde tdo tdr tdt tdu te- tec ted tee teo ter tet teu to- toc tod toe too tor tot tou trc trd tre tro trr trt tru ttc ttd tte tto ttr ttt ttu tuc tud tue tuo tur tut tuu ucc ucd uce uco ucr uct ucu udc udd ude udo udr udt udu uec ued uee uer uet uoc uod uoe uoo uor uot ur- urc urd ure uro urr urt uru utc utd ute uto utr utt utu uuc uue uur uut uuu