-er -up c-- ccc cce cco ccp ccr cct ccu ce- cec cee ceo cep cer cet ceu co- coc coe coo cop cor cot cou cpc cpe cpo cpp cpr cpt cpu crc cre cro crp crr crt cru ctc cte cto ctp ctr ctt ctu cuc cue cuo cup cur cut cuu ec- ecc ece eco ecr ect ecu eec eee eeo eep eer eet eo- eoc eoe eoo eop eor eot eou ep- epc epe epo epp epr ept epu erc ere ero erp err ert eru etc ete eto etp etr ett etu eu- euc eue eup eur eut oc- occ oco ocp ocr oct ocu oec oee oeo oep oer oet oo- ooc ooo oop oor oot op- opc ope opo opp opr opt or- orc ore oro orp orr ort oru ot- otc ote oto otp otr ott otu ou- ouc oue ouo oup our out p-p pcc pce pco pcp pcr pct pcu pec pee peo pep per pet peu poc poe poo pop por pot pou ppc ppe ppo ppp ppr ppt ppu prc pre pro prp prr prt pru pt- ptc pte pto ptp ptr ptt ptu puc pue pup pur put puu rcc rce rco rcp rcr rct rcu re- rec ree reo rep rer ret reu roc roe roo rop ror rot rou rpc rpe rpo rpp rpr rpt rpu rrc rrp rrr rrt rru rtc rte rto rtp rtr rtt rtu ruc rue ruo rup rur rut ruu tcc tce tco tcp tcr tct tcu te- tec tee teo tep ter tet teu to- toc toe too top tor tot tou tpc tpe tpo tpp tpr tpt tpu trc tre tro trp trr trt tru ttc tte tto ttp ttr ttt ttu tuc tue tuo tup tur tut tuu ucc uce uco ucp ucr uct ucu uec uee uep uer uet uoc uoe uoo uop uor uot up- upc upe upo upp upr upt upu ur- urc ure uro urp urr urt uru utc ute uto utp utr utt utu uuc uue uur uut uuu