a-ak a-ok aaaa aaab aaac aaaf aaal aaar aaba aabb aabc aabl aaca aacb aacc aacf aack aacl aaco aacr aafa aafb aafc aaff aafl aaka aala aalc aall aalo aaoo aara aarc aaro abaa abab abac abaf abak abal abar abb- abba abbb abbo abbr abca abcb abcc abcf abcl abcr abff abla ablo aboa abob abof abok abol aboo abor abra abrc abro acaa acab acac acar acba acbl acca accc accf acco acfc acfl acla aclc aclr acoa acol acor acr- acra acrc acro acrr afaa afak afao afar afca afcb afcc affa affc affo afka afkr afla aflc afoa afol afoo afor afr- afra afrc afro akaa akal akao akar akca akka akko aklo akok akr- akra alaa alac alak alal alao alar alb- alba albc albo alca alcc alco alfa alk- alka alkb alko all- alla alll allo allr aloa aloc alof alok alol aloo alor alro aoba aoca aola aora aorb arab arac araf arak aral arar arba arc- arca arco arfa arfb arfc arff arka arko arla arlo aroa arob aroo aror arr- arra arrc arrk arro arrr baaa baaf baak baal baar baba babb babo babr bac- baca bacc back baco bafc baff bafo bak- baka bakl bako bakr bala balc balf balk ball balo baol bar- bara barb barc barf bark baro barr bbbb bbfc bblb bbrc bcaa bcar bcbc bcca bccc bccl bcfc bcof bcor bcra bfca bffl blaa blab blac blak blfc blkb blob bloc blok bloo blrc boab boac boak boal boar boba bobb bobo boca bock boco bofa boff boka boko bola bolk boll bolo boob booc boof book bool boor bor- bora borf bork boro borr brab brac braf brak brao brca brcb brfc brka brkb broa brob broc brok brol broo bror brrr c-bo caaa caab caac caaf caal caba cabf cabo cac- caca cacc cack caco cacr cafa cafb cafc caff cafl caka cala calc calf calk call calo caol caor cara carb carc carf cark carl caro carr cbac cbal cbar cbbc cbca cbcc cbcl cbcr cbfb cbfc cbka cbkl cbko cbkr cblb cblc cbol cbrl ccaa ccab ccac ccaf ccar ccba ccbc ccca cccb cccc cccf cccl ccfa ccfc ccff ccfl ccla cclc ccob ccoc ccra ccrc ccrf ccrl cfaa cfab cfac cfao cfar cfbc cfbr cfca cfcb cfcf cfcl cfco cffb cffr cfoa cfor cfra cfrb ckac ckbc ckck ckcl ckco ckfr cklf ckoa ckob ckoc ckoo ckor ckrc clab claf clar clob clof clok cloo clor clra clro coak coal coba cobb cobo coca cock coco cofc coff cok- coka coko col- cola colb colk coll colo coob coof cook cool cor- cora corb corc corf cork corl coro corr crab crac craf crar crbc crca crcc crcr crfc crfl crkc crkl crlf crob croc crok crol croo cror f--k faaa faac faba fabo faca facc fack fafa fafc faff fafo fako fala falc falk fall falo fara farb farc fark farl faro farr fbar fbla fcab fcal fcar fcba fcca fccf fcra ffar ffcc ffff ffrr fkab flab flac flak flao flcl flob floc flok floo flor foaf foak foal foar foba foca fock foco fofo fola folc folk foll folo folr foof fook fool for- fora forb fork forl foro forr frab frac frak frbc frcc frfc frla frob frol k-lo kaaa kaab kaaf kaak kaal kaar kaba kabb kabc kabf kabo kabr kacb kacc kacl kaco kafa kafc kaff kafr kaka kakc kakk kako kala kalb kalc kalf kalk kall kalo kaoa kaoc kaok kaol kaor kara karb karf kark karl karo karr kbaa kbab kbac kbak kbal kbar kbba kbbb kbbc kbbf kbbk kbbl kbbo kbbr kbca kbcb kbck kbcl kbco kbcr kbfb kbfc kbff kbfk kbfl kbfo kbfr kbkb kbkf kbkk kbkl kbko kbkr kbla kblb kblf kbll kblo kblr kboa kbob kboc kbok kboo kbra kbrb kbrc kbrf kbrk kbrl kbro kcaa kcab kcac kcal kcar kcba kcbc kcbf kcbk kcbl kcbr kcca kccb kccc kcck kccl kccr kcfa kcfb kcfc kcfl kcfo kckc kckf kckk kckl kcko kckr kcla kclc kclf kclk kcll kclr kcob kcof kcol kcor kcrc kcro kcrr kfab kfac kfal kfar kfbc kfbk kfcf kfco kfcr kffa kffb kfff kffk kfka kfkb kfla kflb kflc kflf kfll kflo kfok kfoo kfor kfra kfrc kfro kfrr kkaa kkac kkal kkar kkba kkbb kkbl kkbo kkbr kkcb kkck kkcl kkco kkcr kkfr kkkk kklb kklc kklf kkll kklo kkoa kkob kkol kkoo kkor kkrb kkrc kkrf kkrk kkrl kkro kkrr klaa klab klac klaf klak klal klar klbb klbc klbf klbl klca klcb klcc klck klcl klcr klfa klfc klff klka klkc klkk klkl klko klkr klla kllb kllc kllk kloa klob kloc klok klol kloo klor klrc klrf klrk klrr koab koac koak koal koar koba kobb kobc kobk kobo kobr koca kocb kocf kock kofa kofc koff kofk kofo koka kokb kokc kokf kokk koko kokr kola kolb kolc kolf kolk koll kolo kolr koob kooc kook kool kooo koor kora korb korc korf kork korl koro korr krab krac krak kral krar krba krbb krbk krbl krbr krca krcb krcc krcl krco krfc krff krfo krka krkc krkk krko krkr krla krlc krlf kroa krob kroc krof krok krol kroo kror krrb krrc krrf krrk krrl krro krrr laaa laac laak laal laar laba labo labr laca lacc lack lacl laco lafb lafc laff laka lala lall lalo lara larb larc larf lark larr lbar lbcc lblr lcac lcbc lcca lccc lcfc lcfr lcor lcra lcrl lfca lfcc lkab lkal llao llcc lllc llll lloa lloc lloo loac loaf loar lob- loba lobb lobo loca locc lock loco lofa loff loka lokk loko lola loll lolo loob looc loof look lool loor lora lork loro lrac lral lrba lrfc lroc lrrc lrrr oafc oafo oall oara obak obal obba obbo obkb obla obok obol obor obra obro ocab ocac ocak ocal ocbc occa occc ocfa oclc ocra ocrl ocro ocrr ofcl ofcr off- offa offc offo offr ofla