aaaa aaab aaac aaal aaba aabb aabc aabl aaca aacb aacc aacl aacu aala aalc aall aalu abaa abab abac abal abau 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 alqu alua aqal aqu- aqua auaa auca aul- aula aull aulu baaa baal baba babb babu bac- baca bacc bala balc ball balu baqa bau- baul bbau bbbb bbbq bblb bcaa bcbc bcca bccc bccl bcuc blaa blab blac blau blcu blub bual buba bubb bubq bubu buca bucc bucu bula bulb bull bulu buqa caaa caab caac caal caba cabu cac- caca cacc cala calc call calu cauc caul cbac cbal cbbc cbca cbcc cbcl cbcu cblb cblc ccaa ccab ccac ccba ccbc ccca cccb cccc cccl cccu ccla cclc ccuc clab clau club cuau cub- cuba cubb cuca cucc cucq cula culb culc cull laaa laac laal laba labu laca lacc lacl lacq lacu lala lall lalu laub laul lbcc lcac lcbc lcca lccc llcc lllc llll luau luba luca lula lull lulu luqa luua luuq qa-c qala qalb qlab qqqq quaa quab qual quba qucu qula quu- uabc uaca uaua ubac ubal ubba ubla ucal ucbc ucca ucla ucua ulaa ulbc ulcc ulla ulua ulul uqac uqcc uulu uuuu