-er -up c-- ccc ccd cce cco ccp ccr cct ccu cdc cdd cde cdo cdp cdr cdt cdu ce- cec ced cee ceo cep cer cet ceu co- coc cod coe coo cop cor cot cou cpc cpd cpe cpo cpp cpr cpt cpu crc crd cre cro crp crr crt cru ctc ctd cte cto ctp ctr ctt ctu cuc cud cue cuo cup cur cut cuu dcc dcd dce dco dcp dcr dct dcu ddc ddd dde ddo ddp ddr ddt ddu de- dec ded dee deo dep der det deu doc dod doe doo dop dor dot dou dpc dpd dpe dpo dpp dpr dpt dpu drc drd dre dro drp drr drt dru dtc dtd dte dto dtp dtr dtt dtu duc dud due duo dup dur dut ec- ecc ecd ece eco ecr ect ecu ed- edc edd ede edo edp edr edt edu eec eed eee eeo eep eer eet eo- eoc eod eoe eoo eop eor eot eou ep- epc epd epe epo epp epr ept epu erc erd ere ero erp err ert eru etc etd ete eto etp etr ett etu eu- euc eud eue eup eur eut oc- occ ocd oco ocp ocr oct ocu odc odd ode odo odp odr odt odu oec oed oee oeo oep oer oet oo- ooc ood ooo oop oor oot op- opc opd ope opo opp opr opt or- orc ord ore oro orp orr ort oru ot- otc otd ote oto otp otr ott otu ou- ouc oud oue ouo oup our out p-p pcc pcd pce pco pcp pcr pct pcu pdc pdd pde pdo pdp pdr pdt pdu pec ped pee peo pep per pet peu poc pod poe poo pop por pot pou ppc ppd ppe ppo ppp ppr ppt ppu prc prd pre pro prp prr prt pru pt- ptc ptd pte pto ptp ptr ptt ptu puc pud pue pup pur put puu rcc rcd rce rco rcp rcr rct rcu rdc rdd rde rdo rdp rdr rdt rdu re- rec red ree reo rep rer ret reu roc rod roe roo rop ror rot rou rpc rpd rpe rpo rpp rpr rpt rpu rrc rrd rrp rrr rrt rru rtc rtd rte rto rtp rtr rtt rtu ruc rud rue ruo rup rur rut ruu tcc tcd tce tco tcp tcr tct tcu tdc tdd tde tdo tdp tdr tdt tdu te- tec ted tee teo tep ter tet teu to- toc tod toe too top tor tot tou tpc tpd tpe tpo tpp tpr tpt tpu trc trd tre tro trp trr trt tru ttc ttd tte tto ttp ttr ttt ttu tuc tud tue tuo tup tur tut tuu ucc ucd uce uco ucp ucr uct ucu udc udd ude udo udp udr udt udu uec ued uee uep uer uet uoc uod uoe uoo uop uor uot up- upc upd upe upo upp upr upt upu ur- urc urd ure uro urp urr urt uru utc utd ute uto utp utr utt utu uuc uue uur uut uuu