-er a-a a-c aaa aac aae aaf aak aao aap aar ac- aca acc ace acf ack aco acp acr aea aec aee aef aek aeo aep aer af- afa afc afe aff afk afo afp afr aka akc ake akk ako akp akr aoa aoc aoe aof aok aoo aop aor ap- apa apc ape apf apk apo app apr ar- ara arc are arf ark aro arp arr c-- caa cac cae caf cak cao cap car cca ccc cce ccf cck cco ccp ccr ce- cea cec cee cef cek ceo cep cer cfa cfc cfe cff cfk cfo cfp cfr cka ckc cko co- coa coc coe cof cok coo cop cor cpa cpc cpe cpf cpk cpo cpp cpr cra crc cre crf crk cro crp crr eaa eac eae eaf eak eao eap ear ec- eca ecc ece ecf eck eco ecr eea eec eee eef eek eeo eep eer ef- efa efc efe eff efo efp efr eka ekc eke ekf eko ekp ekr eo- eoa eoc eoe eof eok eoo eop eor ep- epa epc epe epf epo epp epr era erc ere erf erk ero erp err faa fac fae faf fak fao fap far fca fcc fce fcf fck fco fcp fcr fea fec fee fef fek feo fep fer ffa ffc ffe fff ffk ffo ffp ffr fka fkc fkf fkk fkp foa foc foe fof fok foo fop for fpa fpc fpe fpk fpo fpp fpr fra frc fre frf frk fro frp frr ka- kaa kac kae kaf kak kao kap kar kca kcc kce kck kcp kcr ke- kea kec kee kef kek keo kep ker kfa kfc kff kfo kkc kke kkk kkp kkr koa koc koe kof kok koo kop kor kpa kpc kpe kpf kpk kpo kpp kpr kra krc krf krk kro krp krr oaa oac oae oaf oak oao oap oar oc- oca occ ocf ock oco ocp ocr oea oec oee oef oeo oep oer of- ofa ofc ofe off ofo ofp ofr oka okc oke okk oko okp okr oo- ooa ooc oof ook ooo oop oor op- opa opc ope opf opk opo opp opr or- ora orc ore orf ork oro orp orr p-p paa pac pae paf pak pao pap par pca pcc pce pcf pck pco pcp pcr pea pec pee pef pek peo pep per pfa pfc pfe pff pfk pfo pfp pfr pka pkc pke pkf pko pkp pkr poa poc poe pof pok poo pop por ppa ppc ppe ppf ppk ppo ppp ppr pra prc pre prf prk pro prp prr ra- raa rac rae raf rak rao rap rar rca rcc rce rcf rco rcp rcr re- rea rec ree ref rek reo rep rer rfa rfc rfe rff rfk rfo rfp rfr rkc rke rkf rkk rko rkp roa roc roe rof rok roo rop ror rpa rpc rpe rpf rpk rpo rpp rpr rra rrc rrf rrk rrp rrr

a-ak a-ok aaaa aaac aaae aaaf aaap aaar aaca aacc aace aacf aack aaco aacp aacr aaea aaec aaep aafa aafc aaff aaka aake aaoe aaoo aapa aapc aapo aara aarc aare aaro aarp acaa acac acae acap acar acca accc acce accf acco accp ace- acea acec acek acer acfc acfe acke acoa acoe acop acor acpa acpe acpr acr- acra acrc acre acro acrr aeac aeaf aeap aeer aeka aer- aera aerc aero afaa afak afao afap afar afca afcc afee afek afer affa affc affo afka afkr afoa afoe afoo afor afpa afpc afpe afr- afra afrc afre afro akaa akae akao akap akar akca akee aker akka akko akok akpo akr- akra akre aoca aoce aokp aopo aora apac apak apao apap apar apca apcc apco apcr apea apec apep aper apfa apfc apfo apke apo- apoc apoe apof apoo apop apor appa appc appr apra aprc apre apro arac arae araf arak arap arar arc- arca arce arco area arec aree aref arek areo arep arfa arfc arff arka arke arko aroa aroe aroo aror arpa arpe arr- arra arrc arre arrk arro arrr caaa caac caaf caap cac- caca cacc cace cack caco cacr caec caer cafa cafc cafe caff caka cake caor capa capc cape capo capp cara carc care carf cark caro carp carr ccaa ccac ccaf ccap ccar ccca cccc cccf cccp ccee ccfa ccfc ccff ccoc ccpa ccpe ccpp ccpr ccra ccrc ccre ccrf ccrp ceac cear cec- ceca cece ceco cecp ceec cef- cefa cefc ceke ceop ceor cepa cepc cepe cepo cepp cepr cer- cera cerc cere cerf cero cerp cfaa cfac cfae cfao cfar cfca cfcf cfco cffr cfoa cfor cfpa cfpo cfpr cfra cfre cfrp ckac ckck ckco cker ckfr ckoa ckoc ckoo ckor ckpc ckpr ckrc coak coca coce cock coco cocp coep cofc cofe coff cok- coka coke coko coof cook coop copa cope copo copp copr cor- cora corc core corf cork coro corp corr cpaa cpac cpaf cpap cpca cpce cpea cpep cper cpff cppa cpre crac craf crap crar crca crcc crce crcr cre- crea crec cree creo crep crfc crkc crkp croc croe crok croo crop cror crpc eaaf eaca eacc eaec eaop eapc eapp eara eare earo earp ecaa ecac ecao ecar ecca eccc ecce ecco ecef ecfa ecfc ecfr ecka ecko eco- ecop ecpa ecpp ecra ecrc ecrf ecrr eeca eeea eeee eefa eefe eeka eeke eeoc eera eerc eero efca efco efeo effa efke efor efpa eka- ekco ekek eker ekfc ekka ekoa ekpe ekpo eoka eora eore epaa epac epcc epec epee eper epfa epfc epoc epor eppa eppc eppo eppp epra epro eprp eraf erap erca ercc erce ercp erec erer erfc erke eroc eroe eroo erpa erpe erra errc erre erro f--k faaa faac faap faca facc face fack facp fafa fafc fafe faff fafo fake fako fapa fape fapp fara farc fare fark faro farp farr fcap fcar fcca fccf fccp fcpa