-er -up c-- ccc ccd cce cco ccp ccr ccs ccu cdc cdd cde cdo cdp cdr cds cdu ce- cec ced cee ceo cep cer ces ceu co- coc cod coe coo cop cor cos cou cpc cpd cpe cpo cpp cpr cps cpu crc crd cre cro crp crr crs cru csc csd cse cso csp csr css csu cuc cud cue cuo cup cur cus cuu dcc dcd dce dco dcp dcr dcs dcu ddc ddd dde ddo ddp ddr dds ddu de- dec ded dee deo dep der des deu doc dod doe doo dop dor dos dou dpc dpd dpe dpo dpp dpr dps dpu drc drd dre dro drp drr drs dru dsc dsd dse dso dsp dsr dss dsu duc dud due duo dup dur dus ec- ecc ecd ece eco ecr ecs ecu ed- edc edd ede edo edp edr eds edu eec eed eee eeo eep eer ees eo- eoc eod eoe eoo eop eor eos eou ep- epc epd epe epo epp epr eps epu erc erd ere ero erp err ers eru es- esc esd ese eso esp esr ess esu eu- euc eud eue eup eur eus oc- occ ocd oco ocp ocr ocs ocu odc odd ode odo odp odr ods odu oec oed oee oeo oep oer oes oo- ooc ood ooo oop oor oos op- opc opd ope opo opp opr ops or- orc ord ore oro orp orr ors oru os- osc osd ose oso osp osr oss osu ou- ouc oud oue ouo oup our ous p-p pcc pcd pce pco pcp pcr pcs pcu pdc pdd pde pdo pdp pdr pds pdu pec ped pee peo pep per pes peu poc pod poe poo pop por pos pou ppc ppd ppe ppo ppp ppr pps ppu prc prd pre pro prp prr prs pru ps- psc psd pse pso psp psr pss psu puc pud pue pup pur pus puu rcc rcd rce rco rcp rcr rcs rcu rdc rdd rde rdo rdp rdr rds rdu re- rec red ree reo rep rer res reu roc rod roe roo rop ror ros rou rpc rpd rpe rpo rpp rpr rps rpu rrc rrd rrp rrr rrs rru rsc rsd rse rso rsp rsr rss rsu ruc rud rue ruo rup rur rus ruu scc scd sce sco scp scr scs scu sdc sdd sde sdo sdp sdr sds sdu se- sec sed see seo sep ser ses seu soc sod soe soo sop sor sos sou spc spd spe spo spp spr sps spu sr- src srd sre sro srp srr srs ss- ssc ssd sse sso ssp ssr sss ssu suc sud sue suo sup sur sus suu ucc ucd uce uco ucp ucr ucs ucu udc udd ude udo udp udr uds udu uec ued uee uep uer ues uoc uod uoe uoo uop uor uos up- upc upd upe upo upp upr ups upu ur- urc urd ure uro urp urr urs uru usc usd use uso usp usr uss usu uuc uue uur uus uuu