-er a-a a-c aaa aac aad aae aaf aak aao aar ac- aca acc acd ace acf ack aco acr ad- ada adc add ade adf adk ado adr aea aec aed aee aef aek aeo aer af- afa afc afd afe aff afk afo afr aka akc akd ake akk ako akr aoa aoc aod aoe aof aok aoo aor ar- ara arc ard are arf ark aro arr c-- caa cac cad cae caf cak cao car cca ccc ccd cce ccf cck cco ccr cda cdc cdd cde cdf cdk cdo cdr ce- cea cec ced cee cef cek ceo cer cfa cfc cfd cfe cff cfk cfo cfr cka ckc ckd cko co- coa coc cod coe cof cok coo cor cra crc crd cre crf crk cro crr daa dac dad dae daf dak dao dar dca dcc dcd dce dcf dck dco dcr dda ddc ddd dde ddf ddk ddo ddr de- dea dec ded dee def dek deo der dfa dfc dfd dfe dff dfk dfo dfr dka dkc dke dkk dko dkr doa doc dod doe dof dok doo dor dra drc drd dre drk dro drr eaa eac ead eae eaf eak eao ear ec- eca ecc ecd ece ecf eck eco ecr ed- eda edc edd ede edf edk edo edr eea eec eed eee eef eek eeo eer ef- efa efc efd efe eff efo efr eka ekc ekd eke ekf eko ekr eo- eoa eoc eod eoe eof eok eoo eor era erc erd ere erf erk ero err faa fac fad fae faf fak fao far fca fcc fcd fce fcf fck fco fcr fda fdc fdd fde fdf fdk fdo fdr fea fec fed fee fef fek feo fer ffa ffc ffd ffe fff ffk ffo ffr fka fkc fkf fkk foa foc foe fof fok foo for fra frc frd fre frf frk fro frr ka- kaa kac kad kae kaf kak kao kar kca kcc kcd kce kck kcr kda kdc kde kdf kdk kdo kdr ke- kea kec ked kee kef kek keo ker kfa kfc kfd kff kfo kkc kke kkk kkr koa koc kod koe kof kok koo kor kra krc krd krf krk kro krr oaa oac oad oae oaf oak oao oar oc- oca occ ocd ocf ock oco ocr oda odc odd ode odf odo odr oea oec oed oee oef oeo oer of- ofa ofc ofd ofe off ofo ofr oka okc okd oke okk oko okr oo- ooa ooc ood oof ook ooo oor or- ora orc ord ore orf ork oro orr ra- raa rac rad rae raf rak rao rar rca rcc rcd rce rcf rco rcr rda rdc rdd rde rdf rdo rdr re- rea rec red ree ref rek reo rer rfa rfc rfd rfe rff rfk rfo rfr rkc rke rkf rkk rko roa roc rod roe rof rok roo ror rra rrc rrd rrf rrk rrr

a-ak a-do a-ok aaaa aaac aaad aaae aaaf aaar aaca aacc aacd aace aacf aack aaco aacr aada aadc aade aaea aaec aafa aafc aafd aaff aaka aake aaoe aaoo aara aarc aard aare aaro acaa acac acad acae acar acca accc accd acce accf acco acda acdc acde acdf ace- acea acec aced acek acer acfc acfd acfe ackd acke acoa acod acoe acor acr- acra acrc acre acro acrr adaa adac adad adae adak adao adar adcc adda addc addd adde addo addr adea adee adeo ader adfa adfc adoc adod adoe adok adoo ador adra adre adro aeac aeaf aede aeer aeka aer- aera aerc aerd aero afaa afad afak afao afar afca afcc afdc afee afek afer affa affc affo afka afkr afoa afoe afoo afor afr- afra afrc afre afro akaa akae akao akar akca aked akee aker akka akko akok akr- akra akre aoca aoce aora arac arad arae araf arak arar arc- arca arce arco arda ardc arde ardf ardo area arec ared aree aref arek areo arfa arfc arff arka arke arko aroa arod aroe aroo aror arr- arra arrc arre arrk arro arrr c-cd caaa caac caaf cac- caca cacc cace cack caco cacr cada cadc cadd cade cado cadr caec caer cafa cafc cafe caff caka cake caod caor cara carc card care carf cark caro carr ccaa ccac ccad ccaf ccar ccca cccc cccf ccdc ccdf ccdr cced ccee ccfa ccfc ccfd ccff ccoc ccod ccra ccrc ccre ccrf cd-e cd-r cdaa cdac cdad cdda cddr cdec cdef cder cdfa cdfe cdre ceac cead cear cec- ceca cece ceco ceda cedd cede cedo ceec cef- cefa cefc ceke ceor cer- cera cerc cerd cere cerf cero cfaa cfac cfae cfao cfar cfca cfcf cfco cfda cffr cfoa cfor cfra cfre ckac ckck ckco ckdo cker ckfr ckoa ckoc ckoo ckor ckrc ckrd coad coak coca coce cock coco coda codd code coed cofc cofe coff cok- coka coke coko cood coof cook cor- cora corc cord core corf cork coro corr crac craf crar crca crcc crce crcr crda crdc cre- crea crec cred cree creo crfc crkc croc crod croe crok croo cror daad daae daar daca dace dada dade dado daer dafa dafc dafe daff dafo daka dake dako dara darc dard dare darf dark daro darr dcca dccc dcfc dcra dcrk dddd ddoc ddrc ddre deac dead deae deaf deak dear dec- deca decc decd dece deck deco deda dedd dede dedo deed deef deek deer defe deff defo dek- deka deke deor der- dera derc dere derf derk dero derr dfaf dfcc dfco dfer dffa dfoe dfrf dkdc doae doak doar doca doce dock doco dod- doda dodd dode dodo doea doek doer doff doka doke doko dood doof dook door dora dorc dord dore dorf dork doro dorr draa drac drad draf drak drar drca drda drea dred dree dref drek drfc drod drof drra eaaf eaca eacc eada eadd eaec eara eard eare earo ecaa ecac ecad