aaaa aaab aaac aaal aaba aabb aabc aabl aaca aacb aacc aacl aacu aala aalc aall aalu abaa abab abac abal abau abax abb- abba abbb abca abcb abcc abcl abla abua abul acaa acab acac acba acbl acca accc accu acla aclc aclu acu- acul alaa alac alal alau alb- alba albc albu alca alcc all- alla alll allu alua alux alxa auaa auca aul- aula aull aulu auxa axal ba-x baaa baal baba babb babu bac- baca bacc bala balc ball balu bau- baul baux bbau bbbb bblb bcaa bcbc bcca bccc bccl bcuc blaa blab blac blau blcu blub bual buba bubb bubu buca bucc bucu bula bulb bull bulu buxa caaa caab caac caal caba cabu cac- caca cacc cala calc call calu calx cauc caul caux caxa cbac cbal cbax cbbc cbca cbcc cbcl cbcu cblb cblc cbux cbxa ccaa ccab ccac ccba ccbc ccca cccb cccc cccl cccu ccla cclc cclx ccuc ccxl clab clau club clux clxx cuau cub- cuba cubb cuca cucc cula culb culc cull cxxx laaa laac laal laax laba labu laca lacc lacl lacu lala lall lalu laub laul laux laxa lbcc lcac lcbc lcca lccc llcc lllc llll luau luba luca lula lull lulu luua luxa lxxx uabc uaca uaua ubac ubal ubba ubla ucal ucbc ucca ucla ucua ulaa ulbc ulcc ulla ulua ulul uulu uuuu uxul xacl xala xall xcal xcbl xuxa xuxu xxxx