-er -up c-- ccc ccd cce cco ccp ccr ccu cdc cdd cde cdo cdp cdr cdu ce- cec ced cee ceo cep cer ceu co- coc cod coe coo cop cor cou cpc cpd cpe cpo cpp cpr cpu crc crd cre cro crp crr cru cuc cud cue cuo cup cur cuu dcc dcd dce dco dcp dcr dcu ddc ddd dde ddo ddp ddr ddu de- dec ded dee deo dep der deu doc dod doe doo dop dor dou dpc dpd dpe dpo dpp dpr dpu drc drd dre dro drp drr dru duc dud due duo dup dur ec- ecc ecd ece eco ecr ecu ed- edc edd ede edo edp edr edu eec eed eee eeo eep eer eo- eoc eod eoe eoo eop eor eou ep- epc epd epe epo epp epr epu erc erd ere ero erp err eru eu- euc eud eue eup eur oc- occ ocd oco ocp ocr ocu odc odd ode odo odp odr odu oec oed oee oeo oep oer oo- ooc ood ooo oop oor op- opc opd ope opo opp opr or- orc ord ore oro orp orr oru ou- ouc oud oue ouo oup our p-p pcc pcd pce pco pcp pcr pcu pdc pdd pde pdo pdp pdr pdu pec ped pee peo pep per peu poc pod poe poo pop por pou ppc ppd ppe ppo ppp ppr ppu prc prd pre pro prp prr pru puc pud pue pup pur puu rcc rcd rce rco rcp rcr rcu rdc rdd rde rdo rdp rdr rdu re- rec red ree reo rep rer reu roc rod roe roo rop ror rou rpc rpd rpe rpo rpp rpr rpu rrc rrd rrp rrr rru ruc rud rue ruo rup rur ruu ucc ucd uce uco ucp ucr ucu udc udd ude udo udp udr udu uec ued uee uep uer uoc uod uoe uoo uop uor up- upc upd upe upo upp upr upu ur- urc urd ure uro urp urr uru uuc uue uur uuu