a-be aaaa aaab aaac aaae aaal aaba aabb aabc aabl aaca aacb aacc aace aacl aacu aaea aaec aala aalc aale aall aalu abaa abab abac abae abal abau abb- abba abbb abbe abca abcb abcc abcl abec abee abel abla able abua abue abul acaa acab acac acae acba acbl acca accc acce accu ace- acea acec acel acla aclc acle aclu acu- acue acul aeac aecb aecl aela aelc alaa alac alae alal alau alb- alba albc albe albu alca alcc alce alea alec alee aleu all- alla alle alll allu alua auaa aube auca auce auel aul- aula aule aull aulu baaa baal baba babb babe babu bac- baca bacc bace bael bala balc bale ball balu bau- baul bbau bbbb bbeb bblb bcaa bcbc bcca bccc bccl bcec bcuc beal beau beba bebb bebe beca becu beeb beel bela bele bell belu blaa blab blac blae blau blcu blea bleb blee bleu blub blue bual buba bubb bube bubu buca bucc buce bucu buea buel bueu bula bulb bule bull bulu caaa caab caac caal caba cabe cabu cac- caca cacc cace caec caeu cala calc cale call calu cauc caul cbac cbal cbbc cbca cbcc cbce cbcl cbcu cbea cbec cbee cblb cblc ccaa ccab ccac ccba ccbc ccca cccb cccc cccl cccu ccee ccel ccla cclc ccuc ceac ceal ceba cebu cec- ceca cece ceeb ceec ceel cel- cela celc cele cell clab clau clea clec clee cleu club clue cuau cub- cuba cubb cube cuca cucc cuce cula culb culc cule cull e-cl e-la eaba eaca eacc eaec eala ealc eale ebac ebal ebba ebbc ebcc ebel ebla ebul ecaa ecac ecal ecbc ecbe ecca eccb eccc ecce eccl ecla ecua eeca eeea eeee eele el-b elab elac elal elba elbe elbu elca elcb elce elea elec elee ella elle ellu elue elul euba eubc eula eule laaa laac laal laba labe labu laca lacc lace lacl lacu lael lala lale lall lalu laub laue laul lbcc lcac lcbc lcca lccc lcce le-u leaa leal leau leba lebu leca lece leea leel lela lele lell lelu leuc llcc lleu lllc llll luau luba lube luca luce lula lule lull lulu luua uabc uaca uaua ubac ubal ubba ubbe ubla uble ucal ucbc ucca ucea ucel ucla ucua ueba uele uell ulaa ulae ulbc ulcc ulea uleb ulee ulla ulle ulua ulul uulu uuuu