-al a-a a-b a-c aaa aab aac aak aal aar aau ab- aba abb abc abk abl abr abu ac- aca acb acc ack acl acr acu aka akb akc akk akl akr aku al- ala alb alc alk all alr alu ar- ara arb arc ark arl arr aru au- aua aub auc auk aul aur b-u baa bab bac bak bal bar bau bba bbb bbc bbk bbl bbr bbu bca bcb bcc bck bcl bcr bcu bka bkb bkc bkk bkl bkr bla blb blc blk bll blr blu bra brb brk brl brr bru bua bub buc buk bul bur buu c-- caa cab cac cak cal car cau cba cbb cbc cbk cbl cbr cbu cca ccb ccc cck ccl ccr ccu cka ckb ckc cl- cla clb clc clk cll clr clu cra crb crc crk crl crr cru cua cub cuc cuk cul cur cuu ka- kaa kab kac kak kal kar kau kba kbb kbc kbk kbl kbr kbu kca kcb kcc kck kcl kcr kcu kkb kkc kkk kkl kkr kku kl- kla klb klc klr klu kra krc krk krl krr kru kub kuc kuk kul kur kuu la- laa lab lac lak lal lar lau lba lbb lbc lbk lbl lbr lbu lca lcb lcc lck lcl lcr lcu lka lkb lkl lkr lla llb llc llk lll llr llu lra lrb lrc lrk lrr lru lua lub luc luk lul lur luu ra- raa rab rac rak ral rar rau rba rbb rbc rbk rbl rbr rbu rca rcb rcc rcl rcr rcu rkb rkc rkk rku rla rlc rll rlr rlu rra rrb rrc rrk rrl rrr rru rua rub ruc ruk rur ruu ua- uaa uab uac uak ual uar uau uba ubb ubc ubk ubl ubr ubu uca ucb ucc uck ucl ucr ucu uka ukb ukc ukk ukl ukr uku ula ulb ulc ulk ull ulr ulu ur- ura urb urc urk url urr uru uua uuc uur uuu

a-ak aaaa aaab aaac aaal aaar aaba aabb aabc aabl aaca aacb aacc aack aacl aacr aacu aaka aaku aala aalc aall aalu aara aarc aaru abaa abab abac abak abal abar abau abb- abba abbb abbr abca abcb abcc abcl abcr abla abra abrc abua abuk abul acaa acab acac acar acba acbl acca accc accu acla aclc aclr aclu acr- acra acrc acrr acu- acul acur akaa akal akar akca akka akku akr- akra akua alaa alac alak alal alar alau alb- alba albc albu alca alcc alk- alka alkb alku all- alla alll allr allu alua aluk alur arab arac arak aral arar arau arba arc- arca arka arla arr- arra arrc arrk arrr arru arua arub arul auaa auca aul- aula aull aulu aur- aura baaa baak baal baar baba babb babr babu bac- baca bacc back bak- baka bakl bakr baku bala balc balk ball balu bar- bara barb barc bark barr baru bau- bauk baul baur bbau bbbb bblb bbrc bcaa bcar bcbc bcca bccc bccl bcra bcru bcuc blaa blab blac blak blau blcu blkb blrc blub blur brab brac brak brau brca brcb brka brkb brrr bruc bual buar buba bubb bubu buca bucc buck bucu buka bukk buku bula bulb bulk bull bulu bur- bura burb burk burl burr buru caaa caab caac caal caba cabu cac- caca cacc cack cacr caka cala calc calk call calu cara carb carc cark carl carr cauc cauk caul cbac cbal cbar cbbc cbca cbcc cbcl cbcr cbcu cbka cbkl cbkr cblb cblc cbrl ccaa ccab ccac ccar ccba ccbc ccca cccb cccc cccl cccu ccla cclc ccra ccrc ccrl ccuc ckac ckbc ckck ckcl ckrc clab clar clau clra club crab crac crar crau crbc crbu crca crcc crcr crkc crkl crub cruk cuau cub- cuba cubb cuca cucc cuck cuk- cuka cula culb culc culk cull cura curb curl curr kaaa kaab kaak kaal kaar kaba kabb kabc kabr kabu kacb kacc kacl kacu kaka kakc kakk kaku kala kalb kalc kalk kall kalu kara karb kark karl karr karu kau- kaub kauc kauk kaul kaur kbaa kbab kbac kbak kbal kbar kbba kbbb kbbc kbbk kbbl kbbr kbbu kbca kbcb kbck kbcl kbcr kbcu kbkb kbkk kbkl kbkr kbla kblb kbll kblr kblu kbra kbrb kbrc kbrk kbrl kbru kbua kbub kbuc kbuk kbul kbur kbuu kcaa kcab kcac kcal kcar kcau kcba kcbc kcbk kcbl kcbr kcbu kcca kccb kccc kcck kccl kccr kccu kckc kckk kckl kckr kcla kclc kclk kcll kclr kclu kcrc kcrr kcru kcua kcub kcuk kcul kkaa kkac kkal kkar kkba kkbb kkbl kkbr kkcb kkck kkcl kkcr kkkk kklb kklc kkll kkrb kkrc kkrk kkrl kkrr kkua kkuu klaa klab klac klak klal klar klbb klbc klbl klbu klca klcb klcc klck klcl klcr klka klkc klkk klkl klkr klla kllb kllc kllk klrc klrk klrr klru klub kluk klur kluu krab krac krak kral krar krba krbb krbk krbl krbr krca krcb krcc krcl krcu krka krkc krkk krkr krku krla krlc krrb krrc krrk krrl krrr krua kruc kruk krul krur kuac kuar kuau kuba kubb kubc kubr kubu kuca kucb kucc kucr kuka kukk kukl kuku kula kulb kull kulu kura kurb kurk kurl kurr kuru kuub kuuk kuul kuur kuuu laaa laac laak laal laar laba labr labu laca lacc lack lacl lacu laka lala lall lalu lara larb larc lark larr laru laub lauk laul laur lbar lbcc lblr lcac lcbc lcca lccc lcra lcrl lkab lkal llcc lllc llll lrac lral lrba lrrc lrrr luau luba luca luck luka lula lull lulu lura lurk luua luuk raab raak raba rabb rabk rabl rabu rac- raca racc rack racu raka rakk raku rala ralb rall rara rarb rark raua raub rauc rauk raul rbbb rbbr rbcl rcac rcbc rccb rccc rlab rlua rrrr ruba rubb rubu ruca ruck ruka rukk ruku rula rulk rull rura rurc ruru uabc uaca uarc uaru uaua ubac ubal