-er a-a a-c aaa aac aae aaf aak aao aar ac- aca acc ace acf ack aco acr aea aec aee aef aek aeo aer af- afa afc afe aff afk afo afr aka akc ake akk ako akr aoa aoc aoe aof aok aoo aor ar- ara arc are arf ark aro arr c-- caa cac cae caf cak cao car cca ccc cce ccf cck cco ccr ce- cea cec cee cef cek ceo cer cfa cfc cfe cff cfk cfo cfr cka ckc cko co- coa coc coe cof cok coo cor cra crc cre crf crk cro crr eaa eac eae eaf eak eao ear ec- eca ecc ece ecf eck eco ecr eea eec eee eef eek eeo eer ef- efa efc efe eff efo efr eka ekc eke ekf eko ekr eo- eoa eoc eoe eof eok eoo eor era erc ere erf erk ero err faa fac fae faf fak fao far fca fcc fce fcf fck fco fcr fea fec fee fef fek feo fer ffa ffc ffe fff ffk ffo ffr fka fkc fkf fkk foa foc foe fof fok foo for fra frc fre frf frk fro frr ka- kaa kac kae kaf kak kao kar kca kcc kce kck kcr ke- kea kec kee kef kek keo ker kfa kfc kff kfo kkc kke kkk kkr koa koc koe kof kok koo kor kra krc krf krk kro krr oaa oac oae oaf oak oao oar oc- oca occ ocf ock oco ocr oea oec oee oef oeo oer of- ofa ofc ofe off ofo ofr oka okc oke okk oko okr oo- ooa ooc oof ook ooo oor or- ora orc ore orf ork oro orr ra- raa rac rae raf rak rao rar rca rcc rce rcf rco rcr re- rea rec ree ref rek reo rer rfa rfc rfe rff rfk rfo rfr rkc rke rkf rkk rko roa roc roe rof rok roo ror rra rrc rrf rrk rrr

a-ak a-ok aaaa aaac aaae aaaf aaar aaca aacc aace aacf aack aaco aacr aaea aaec aafa aafc aaff aaka aake aaoe aaoo aara aarc aare aaro acaa acac acae acar acca accc acce accf acco ace- acea acec acek acer acfc acfe acke acoa acoe acor acr- acra acrc acre acro acrr aeac aeaf aeer aeka aer- aera aerc aero afaa afak afao afar afca afcc afee afek afer affa affc affo afka afkr afoa afoe afoo afor afr- afra afrc afre afro akaa akae akao akar akca akee aker akka akko akok akr- akra akre aoca aoce aora arac arae araf arak arar arc- arca arce arco area arec aree aref arek areo arfa arfc arff arka arke arko aroa aroe aroo aror arr- arra arrc arre arrk arro arrr caaa caac caaf cac- caca cacc cace cack caco cacr caec caer cafa cafc cafe caff caka cake caor cara carc care carf cark caro carr ccaa ccac ccaf ccar ccca cccc cccf ccee ccfa ccfc ccff ccoc ccra ccrc ccre ccrf ceac cear cec- ceca cece ceco ceec cef- cefa cefc ceke ceor cer- cera cerc cere cerf cero cfaa cfac cfae cfao cfar cfca cfcf cfco cffr cfoa cfor cfra cfre ckac ckck ckco cker ckfr ckoa ckoc ckoo ckor ckrc coak coca coce cock coco cofc cofe coff cok- coka coke coko coof cook cor- cora corc core corf cork coro corr crac craf crar crca crcc crce crcr cre- crea crec cree creo crfc crkc croc croe crok croo cror eaaf eaca eacc eaec eara eare earo ecaa ecac ecao ecar ecca eccc ecce ecco ecef ecfa ecfc ecfr ecka ecko eco- ecra ecrc ecrf ecrr eeca eeea eeee eefa eefe eeka eeke eeoc eera eerc eero efca efco efeo effa efke efor eka- ekco ekek eker ekfc ekka ekoa eoka eora eore eraf erca ercc erce erec erer erfc erke eroc eroe eroo erra errc erre erro f--k faaa faac faca facc face fack fafa fafc fafe faff fafo fake fako fara farc fare fark faro farr fcar fcca fccf fcra feaf feak fear fece feck feek feer fefc fefe feff fefo feke feko feof fera ferc fere ferk fero ferr ffar ffcc ffee ffff ffrr foaf foak foar foca foce fock foco foer fofo foke foof fook for- fora fore fork foro forr frac frae frak frcc frea free freo frfc froe kaaa kaaf kaak kaar kacc kace kaco kaeo kaer kafa kafc kafe kaff kafr kaka kakc kake kakk kako kaoa kaoc kaok kaor kara kare karf kark karo karr kcaa kcac kcar kcca kccc kcck kccr kcea kcec kcee kceo kcfa kcfc kcfo kckc kckf kckk kcko kckr kcoe kcof kcor kcrc kcro kcrr kea- keak kear keca keck keco kecr keef keek keer kefa kefc keff kefr keka kekc keke keko keok ker- kera kerc kere kerf kerk kero kerr kfac kfar kfcf kfco kfcr kfer kffa kfff kffk kfka kfok kfoo kfor kfra kfrc kfre kfro kfrr kkaa kkac kkar kkck kkco kkcr kkea kkfr kkkk kkoa kkoo kkor kkrc kkre kkrf kkrk kkro kkrr koac koae koak koar koca kocf kock koea kofa kofc kofe koff kofk kofo koka kokc koke kokf kokk koko kokr kooc kook kooo koor kora korc kore korf kork koro korr krac krae krak krar krca krcc krce krco krea krec kree kref krek kreo krfc krfe krff krfo krka krkc krke krkk krko krkr kroa kroc kroe krof krok kroo kror krrc krre krrf krrk krro krrr o-eo oaer oafc oafo oake oara oare ocac ocak occa occc oce ocee ocef ocfa ocke ocra ocre ocro ocrr oec- oeca oecc oeec oera oere ofcr ofek ofer off- offa offc offe offo offr ofor ofra ofre okak oker okka okko okok okor okra okre okro ooaa ooak oocr ooer ooff oooo oora oore orac orae orak orao orar orca orce orco ore- orea orec orek oreo orer orfe orff orka orke orko oro- oroe orof orok oror orra