a-ak aaaa aaab aaac aaal aaba aabb aabc aabl aaca aacb aacc aack aacl aacu aaka aaku aala aalc aall aalu abaa abab abac abak abal abau abb- abba abbb abca abcb abcc abcl abla abua abuk abul acaa acab acac acba acbl acca accc accu acla aclc aclu acu- acul akaa akal akca akka akku akua alaa alac alak alal alau alb- alba albc albu alca alcc alk- alka alkb alku all- alla alll allu alua aluk auaa auca aul- aula aull aulu baaa baak baal baba babb babu bac- baca bacc back bak- baka bakl baku bala balc balk ball balu bau- bauk baul bbau bbbb bblb bcaa bcbc bcca bccc bccl bcuc blaa blab blac blak blau blcu blkb blub bual buba bubb bubu buca bucc buck bucu buka bukk buku bula bulb bulk bull bulu caaa caab caac caal caba cabu cac- caca cacc cack caka cala calc calk call calu cauc cauk caul cbac cbal cbbc cbca cbcc cbcl cbcu cbka cbkl cblb cblc ccaa ccab ccac ccba ccbc ccca cccb cccc cccl cccu ccla cclc ccuc ckac ckbc ckck ckcl clab clau club cuau cub- cuba cubb cuca cucc cuck cuk- cuka cula culb culc culk cull kaaa kaab kaak kaal kaba kabb kabc kabu kacb kacc kacl kacu kaka kakc kakk kaku kala kalb kalc kalk kall kalu kau- kaub kauc kauk kaul kbaa kbab kbac kbak kbal kbba kbbb kbbc kbbk kbbl kbbu kbca kbcb kbck kbcl kbcu kbkb kbkk kbkl kbla kblb kbll kblu kbua kbub kbuc kbuk kbul kbuu kcaa kcab kcac kcal kcau kcba kcbc kcbk kcbl kcbu kcca kccb kccc kcck kccl kccu kckc kckk kckl kcla kclc kclk kcll kclu kcua kcub kcuk kcul kkaa kkac kkal kkba kkbb kkbl kkcb kkck kkcl kkkk kklb kklc kkll kkua kkuu klaa klab klac klak klal klbb klbc klbl klbu klca klcb klcc klck klcl klka klkc klkk klkl klla kllb kllc kllk klub kluk kluu kuac kuau kuba kubb kubc kubu kuca kucb kucc kuka kukk kukl kuku kula kulb kull kulu kuub kuuk kuul kuuu laaa laac laak laal laba labu laca lacc lack lacl lacu laka lala lall lalu laub lauk laul lbcc lcac lcbc lcca lccc lkab lkal llcc lllc llll luau luba luca luck luka lula lull lulu luua luuk uabc uaca uaua ubac ubal ubba ubla ucak ucal ucbc ucca ucka ucla ucua ukba ukcc ukla ulaa ulbc ulcc ulla ulua uluk ulul uulu uuuu