a-ak a-do a-ok aaaa aaac aaad aaar aaca aacc aacd aack aaco aacr aada aadc aaka aaoo aara aarc aard aaro acaa acac acad acar acca accc accd acco acda acdc ackd acoa acod acor acr- acra acrc acro acrr adaa adac adad adak adao adar adcc adda addc addd addo addr adoc adod adok adoo ador adra adro akaa akao akar akca akka akko akok akr- akra aoca aora arac arad arak arar arc- arca arco arda ardc ardo arka arko aroa arod aroo aror arr- arra arrc arrk arro arrr c-cd caaa caac cac- caca cacc cack caco cacr cada cadc cadd cado cadr caka caod caor cara carc card cark caro carr ccaa ccac ccad ccar ccca cccc ccdc ccdr ccoc ccod ccra ccrc cd-r cdaa cdac cdad cdda cddr ckac ckck ckco ckdo ckoa ckoc ckoo ckor ckrc ckrd coad coak coca cock coco coda codd cok- coka coko cood cook cor- cora corc cord cork coro corr crac crar crca crcc crcr crda crdc crkc croc crod crok croo cror daad daar daca dada dado daka dako dara darc dard dark daro darr dcca dccc dcra dcrk dddd ddoc ddrc dkdc doak doar doca dock doco dod- doda dodd dodo doka doko dood dook door dora dorc dord dork doro dorr draa drac drad drak drar drca drda drod drra kaaa kaak kaar kacc kacd kaco kad- kada kadd kado kadr kaka kakc kakk kako kaoa kaoc kaok kaor kara kard kark karo karr kcaa kcac kcad kcar kcca kccc kccd kcck kccr kcda kcdc kcdd kcdr kckc kckk kcko kckr kcor kcrc kcro kcrr kdaa kdac kdad kdak kdao kdar kdca kdcc kdcd kdco kdcr kddc kddd kddk kddr kdka kdkd kdkk kdko kdkr kdoc kdok kdro kkaa kkac kkar kkcd kkck kkco kkcr kkda kkdc kkdd kkdo kkkk kkoa kkoo kkor kkrc kkrk kkro kkrr koac koak koar koca kocd kock koda kodk kodo koka kokc kokk koko kokr kooc kook kooo koor kora korc kord kork koro korr krac krad krak krar krca krcc krcd krco krda krdc krdd krdo krdr krka krkc krkd krkk krko krkr kroa kroc krod krok kroo kror krrc krrk krro krrr oara ocac ocad ocak occa occc ocra ocro ocrr odac odda oddd odoo odor odra okak okka okko okok okor okra okro ooaa ooak oocr ooda oooo oora oord orac orad orak orao orar orca orco orda ordo orka orko oro- orok oror orra orro raad raak rac- raca racc rack raco rada radc radd rado radr raka rakk raoc raok rara rark raro rcac rccc rcdc rcrd rdac rdoc road roak roar roca rocc rock roco roda rodd rodo roka rokk roko rokr rood rook roor rora rorc rork roro rrad rrrr