a-ak a-do a-ok aaaa aaab aaac aaad aaap aaar aaba aabb aabc aabd aabp aaca aacb aacc aacd aack aaco aacp aacr aada aadc aaka aaoo aapa aapc aapo aara aarc aard aaro aarp abaa abab abac abad abak abap abar abb- abba abbb abbo abbr abca abcb abcc abcd abcp abcr abda abdo aboa abob abod abok aboo abor abpa abpc abpd abpp abpr abra abrc abro acaa acab acac acad acap acar acba acca accc accd acco accp acda acdb acdc acdp ackd acoa acod acop acor acpa acpd acpr acr- acra acrc acro acrr adaa adab adac adad adak adao adap adar adba adbc adcc adda addc addd addo addr adob adoc adod adok adoo ador adp- adra adro akaa akao akap akar akca akka akko akok akpo akr- akra aoba aoca aokp aopo aora aorb apac apak apao apap apar apba apbr apca apcb apcc apcd apco apcr apda apdd apo- apoc apod apoo apop apor appa appc appd appr apra aprc apro arab arac arad arak arap arar arba arc- arca arco arda ardc ardo arka arko aroa arob arod aroo aror arpa arr- arra arrc arrk arro arrr baaa baad baak baar baba babb babo babr bac- baca bacc back baco bada badb badd bado badr bak- baka bako bakr bapa bapc bapp bar- bara barb barc bard bark baro barr bbad bbbb bbdd bbdo bbpr bbrc bcaa bcap bcar bcbc bcbp bcca bccc bcda bcor bcpp bcra bd-r bdbc bddc bdpc bkpr boab boac boad boak boar boba bobb bobo boca bock boco boda bodb bodo boka boko boob booc bood book boop boor bopa bopp bor- bora bord bork boro borr bpcp bpda bprc bprd brab brac brad brak brao brca brcb brda brdo brka brkb broa brob broc brod brok broo bror brrr c-bo c-cd caaa caab caac caap caba cabo cac- caca cacc cack caco cacr cada cadc cadd cado cadr caka caod caor capa capb capc capd capo capp cara carb carc card cark caro carp carr cbac cbar cbbc cbca cbcc cbcp cbcr cbdb cbdc cbdo cbka cbko cbkr cbpc cbpp cbrd ccaa ccab ccac ccad ccap ccar ccba ccbc ccca cccb cccc cccp ccdc ccdp ccdr ccob ccoc ccod ccpa ccpp ccpr ccra ccrc ccrp cd-r cdaa cdac cdad cdba cdda cddb cddr ckac ckbc ckck ckco ckdo ckoa ckob ckoc ckoo ckor ckpc ckpr ckrc ckrd coad coak coba cobb cobo coca cock coco cocp coda codd cok- coka coko coob cood cook coop copa copd copo copp copr cor- cora corb corc cord cork coro corp corr cpaa cpac cpad cpap cpbc cpca cppa cppd crab crac crap crar crbc crca crcc crcr crda crdc crkc crkp crob croc crod crok croo crop cror crpc d-bo daab daad daap daar daba dabb dabo dabp daca dada dado daka dako dapa dapp dara darb darc dard dark daro darp darr dbar dbcc dbcp dbpc dbpd dcbc dcca dccb dccc dccp dcdb dcop dcpo dcra dcrk dddd ddoc ddpo ddrc dkba dkdc doab doak doap doar doba dobb doca dock doco dod- doda dodd dodo doka doko doob dood dook doop door dopa dopo dopp dopr dora dorc dord dork doro dorp dorr dpaa dpac dpbc dpcp dppa dppc dprk draa drab drac drad drak drap drar drba drbc drca drda drob drod drop drra kaaa kaab kaak kaap kaar kaba kabb kabc kabd kabo kabr kacb kacc kacd kaco kacp kad- kada kadd kado kadr kaka kakc kakk kako kaoa kaoc kaok kaor kap- kapa kapc kapo kapp kara karb kard kark karo karp karr kbaa kbab kbac kbad kbak kbap kbar kbba kbbb kbbc kbbd kbbk kbbo kbbr kbca kbcb kbck kbco kbcr kbdb kbdo kbdr kbkb kbkk kbko kbkr kboa kbob kboc kbod kbok kboo kbpa kbpc kbpk kbpo kbpr kbra kbrb kbrc kbrd kbrk kbro kcaa kcab kcac kcad kcap kcar kcba kcbc kcbd kcbk kcbr kcca kccb kccc kccd kcck kccr kcda kcdc kcdd kcdr kckc kckk kcko kckr kcob kcor kcpa kcpc kcpo kcpr kcrc kcro kcrp kcrr kdaa kdab kdac kdad kdak kdao kdap kdar kdbb kdbr kdca kdcc kdcd kdco kdcr kddb kddc kddd kddk kddr kdka kdkb kdkd kdkk kdko kdkr kdoc kdok kdpr kdrb kdro kkaa kkac kkap kkar kkba kkbb kkbd kkbo kkbr kkcb kkcd kkck kkco kkcr kkda kkdc kkdd kkdo kkkk kkoa kkob kkoo kkor kkpc kkpk kkrb kkrc kkrk kkro kkrr koab koac koak koap koar koba kobb kobc kobk kobo kobr koca kocb kocd kock kocp koda kodk kodo koka kokb kokc kokk koko kokp kokr koob kooc kook kooo koop koor kopa kopb kopp kopr kora korb korc kord kork koro korr kpac kpad kpak kpao kpar kpba kpbb kpbd kpbr kpcc kpcr kpda kpdb kpdc kpdo kpdr kpkk kpkr kpoa kpob kpoc kpod kpok kpoo kpop kppc kppd kppk kppo kppp kppr kprb kprc kprd kprk kpro kprp kprr krab krac krad krak krap krar krba krbb krbd krbk krbr krca krcb krcc krcd krco krda krdc krdd krdo krdr krka krkc krkd krkk krko krkr kroa krob kroc krod krok kroo krop kror krpa krpr krrb krrc krrk krro krrr oara obad obak obba obbo obkb obok obor obra obro ocab ocac ocad ocak ocap ocbc occa occc ocpa ocpd ocpp ocra ocro ocrr odac odbo odda oddd odoo odop odor odra odrp okak okap okka okko okok okor okpo okra okro ooaa ooak ooba oocr ooda oooo oora oord opap opar opca opo- opor oppa oppo opra orab orac orad orak orao orar orba orbb orbo orca orco orda ordo orka orko oro- orok oror orpc orra orro paak paap paar paba paca pacd pack paco pada padd pado paka pako paoc papa papb papp papr par- para parc pard park paro parp parr pbac pbar pbcc pboc pbpa pbpk pcaa pcad pcap pcba pcbc pcca pccc pcoa pcod pcpb pcpp pcra pcrc pcrd pdac pdca pdcp pdoc pdpa pdpr pdrc poad poak poar poba pobo poca pocd