a-be a-ii aaaa aaab aaac aaae aaai aaal aaba aabb aabc aabi aabl aaca aacb aacc aace aaci aacl aaea aaec aaib aaic aaii aala aalc aale aali aall abaa abab abac abae abai abal abb- abba abbb abbe abbi abca abcb abcc abci abcl abec abee abel abia abib abic abie abil abla able acaa acab acac acae acai acba acbl acca accc acce acci ace- acea acec acel aci- acia acic acie acla aclc acle acli aeac aebi aecb aeci aecl aela aelc aiai aiba aibl aica aicc aice aiea aiee aiel aiia aiib aiic aila aile aili alaa alac alae alai alal alb- alba albc albe albi alca alcc alce alea alec alee ali- alia alib alie alii alil all- alla alle alli alll ba-i baaa baal baba babb babe babi bac- baca bacc bace baci bael baia baib baic baie bail bala balc bale bali ball bbbb bbci bbeb bblb bcaa bcbc bcca bccc bcci bccl bcec bcia bcie beal beba bebb bebe bebi beca beci beeb beel beia beic beil bela bele beli bell bial biba bibb bibe bibi bibl bica bicc bice bici bieb biel bila bile bili bill blaa blab blac blae blea bleb blee blei blic caaa caab caac caal caba cabe cabi cac- caca cacc cace caci caec caei caia caib caic cail cala calc cale cali call cbac cbal cbbc cbca cbcc cbce cbcl cbea cbec cbee cbia cblb cblc ccaa ccab ccac ccai ccba ccbc ccca cccb cccc ccci cccl ccee ccel ccic ccii ccil ccla cclc ccli ceac ceal ceba cec- ceca cece ceci ceeb ceec ceel ceil cel- cela celc cele celi cell ciaa cial ciba cibc cibe cibi cica cicc cici ciee ciel ciia ciii cila cili cill clab clai clea clec clee clei clib clic clii e-cl e-la eaba eaca eacc eaec eala ealc eale ebac ebal ebba ebbc ebcc ebel ebic ebla ebli ecaa ecac ecai ecal ecbc ecbe ecca eccb eccc ecce ecci eccl ecib ecil ecla eeca eeea eeee eele eica eiec eiei eila eile el-b elab elac elai elal elba elbe elbi elca elcb elce elea elec elee elia elic elie elil ella elle elli i-be iaaa iaac iaai iaal iaba iaca iacc iaea iaec iaia iala iale iall ibac ibca ibea ibec ibia ibie ible icaa icab icac icai ical icbc icca iccb iccc icci iccl icea icec icee icel icle icll ieac iecc ieie iele iiac iica iiie iiii iila ilac ilal ilbc ilca ilce ile- ilea ilec ilia ilic ilie ill- illa ille illi laaa laac laal laba labe labi laca lacc lace laci lacl lael laia laic laie lail lala lale lali lall lbcc lbia lcac lcbc lcca lccc lcce lcia leaa leal leba leca lece leea leel leia leib leic leie leil lela lele leli lell liac liba libc libe lica lice lieb liel liia liii lila lilb lile lili lill llcc lllc llll