a-ak a-do a-ok aaaa aaab aaac aaad aaaf aaal aaba aabb aabc aabd aabl aaca aacb aacc aacd aacf aack aacl aaco aada aadc aafa aafb aafc aafd aaff aafl aaka aala aalc aald aall aalo aaoo abaa abab abac abad abaf abak abal abb- abba abbb abbo abca abcb abcc abcd abcf abcl abda abdo abff abla ablo aboa abob abod abof abok abol aboo acaa acab acac acad acba acbl acca accc accd accf acco acda acdb acdc acdf acfc acfd acfl ackd acla aclc acoa acod acol adaa adab adac adad adak adal adao adba adbc adcc adda addc addd addl addo adfa adfc adfl adob adoc adod adok adoo afaa afad afak afao afca afcb afcc afdb afdc afdl affa affc affo afka afla aflc afoa afol afoo akaa akal akao akca akka akko aklo akok alaa alac alad alak alal alao alb- alba albc albo alca alcc alco ald- alda aldl aldo alfa alk- alka alkb alkd alko all- alla alll allo aloa aloc alod alof alok alol aloo aoba aoca aola baaa baad baaf baak baal baba babb babo bac- baca bacc back baco bada badb badd bado bafc baff bafo bak- baka bakl bako bala balc bald balf balk ball balo baol bbad bbbb bbdd bbdo bbfc bblb bcaa bcbc bcca bccc bccl bcda bcfc bcof bdbc bddc bfca bffl blaa blab blac blad blak bldc blfc blkb blkd blob bloc blod blok bloo boab boac boad boak boal boba bobb bobo boca bock boco boda bodb bodo bofa bofd boff boka boko bola bold bolk boll bolo boob booc bood boof book bool c-bo c-cd caaa caab caac caaf caal caba cabf cabo cac- caca cacc cack caco cada cadc cadd cado cafa cafb cafc caff cafl caka cala calc cald calf calk call calo caod caol cbac cbal cbbc cbca cbcc cbcl cbdb cbdc cbdo cbfb cbfc cbka cbkl cbko cblb cblc cbol ccaa ccab ccac ccad ccaf ccba ccbc ccca cccb cccc cccf cccl ccdc ccdf ccfa ccfc ccfd ccff ccfl ccla cclc ccob ccoc ccod cdaa cdac cdad cdba cdbf cdda cddb cddl cdfa cfaa cfab cfac cfao cfbc cfca cfcb cfcf cfcl cfco cfda cffb cfoa ckac ckbc ckck ckcl ckco ckdo cklf ckoa ckob ckoc ckoo clab clad claf clcd cldc clob clod clof clok cloo coad coak coal coba cobb cobo coca cock coco coda codd codl cofc coff cok- coka coko col- cola colb cold colk coll colo coob cood coof cook cool d-bo daab daad daal daba dabb dabo daca dada dado dafa dafc daff dafo daka dako dala dalf dalk dall dalo dbcc dbfc dbfo dcbc dcca dccb dccc dccl dcdb dcfc dddd ddlc ddoc dfaf dfcc dfco dffa dkba dkdc dlab dlbd dlco doab doak doal doba dobb dobl doca dock doco dod- doda dodd dodo doff doka doko dola dold dolf dolk doll dolo doob dood doof dook dool f--k faaa faac faad faba fabd fabo faca facc fack fada fadd fado fafa fafc faff fafo fako fala falc fald falk fall falo fbla fcab fcal fcba fcca fccf fcda fdca fdoa fdoc ffcc ffff fkab flab flac flad flak flao flcl flob floc flod flok floo foad foaf foak foal foba foca fock foco foda fofo fola folc fold folk foll folo food foof fook fool k-lo kaaa kaab kaaf kaak kaal kaba kabb kabc kabd kabf kabo kacb kacc kacd kacl kaco kad- kada kadd kadf kadl kado kafa kafc kaff kaka kakc kakk kako kala kalb kalc kald kalf kalk kall kalo kaoa kaoc kaok kaol kbaa kbab kbac kbad kbak kbal kbba kbbb kbbc kbbd kbbf kbbk kbbl kbbo kbca kbcb kbck kbcl kbco kbdb kbdf kbdl kbdo kbfb kbfc kbff kbfk kbfl kbfo kbkb kbkf kbkk kbkl kbko kbla kblb kbld kblf kbll kblo kboa kbob kboc kbod kbok kboo kcaa kcab kcac kcad kcal kcba kcbc kcbd kcbf kcbk kcbl kcca kccb kccc kccd kcck kccl kcda kcdc kcdd kcfa kcfb kcfc kcfd kcfl kcfo kckc kckf kckk kckl kcko kcla kclc kclf kclk kcll kcob kcof kcol kdaa kdab kdac kdad kdaf kdak kdal kdao kdbb kdbl kdca kdcc kdcd kdco kddb kddc kddd kddf kddk kddl kdfc kdfo kdka kdkb kdkd kdkk kdko kdla kdlb kdlc kdld kdlf kdll kdlo kdoc kdok kfab kfac kfal kfbc kfbk kfcd kfcf kfco kfda kffa kffb kfff kffk kfka kfkb kfla kflb kflc kfld kflf kfll kflo kfok kfoo kkaa kkac kkal kkba kkbb kkbd kkbl kkbo kkcb kkcd kkck kkcl kkco kkda kkdc kkdd kkdl kkdo kkkk kklb kklc kkld kklf kkll kklo kkoa kkob kkol kkoo klaa klab klac klad klaf klak klal klbb klbc klbd klbf klbl klca klcb klcc klcd klck klcl kldc kldd klfa klfc klfd klff klka klkc klkk klkl klko klla kllb kllc kllk kloa klob kloc klok klol kloo koab koac koak koal koba kobb kobc kobk kobo koca kocb kocd kocf kock koda kodk kodl kodo kofa kofc koff kofk kofo koka kokb kokc kokf kokk koko kola kolb kolc kold kolf kolk koll kolo koob kooc kook kool kooo laaa laac laad laak laal laba labo laca lacc lack lacl laco lada ladd lado lafb lafc laff laka lala lald lall lalo lbcc lcac lcad lcbc lcca lccc lcdd lcfc ldcf lfca lfcc lkab lkal llao llcc lldb lldc lllc llll lloa lloc llod lloo loac load loaf lob- loba lobb lobo loca locc lock loco loda lofa loff loka lokk loko lola lold loll lolo loob looc lood loof look lool oafc oafo oall obad obak obal obba obbo obkb obla obok obol ocab ocac ocad ocak ocal ocbc occa occc ocfa oclc odac odal odbo odda oddd odla odoo ofcl off- offa offc offo ofla okak okka okko okla oklo okok okol olac olaf olba olbo olca olcc oldb olfa olka olla ollo olof ooaa ooak ooba ooda ooff oola oold oolo oooo