a-ii aaaa aaab aaac aaai aaal aaba aabb aabc aabi aabl aabt aaca aacb aacc aaci aacl aact aaib aaic aaii aala aalc aali aall aata aatc aatt abaa abab abac abai abal abat abb- abba abbb abbi abbt abca abcb abcc abci abcl abct abia abib abic abil abit abla abta ac-t acaa acab acac acai acat acba acbl acca accc acci acct aci- acia acic acla aclc acli acta actc acti actl actt aiai aiba aibl aica aicc aiia aiib aiic aila aili aita aiti aitt alaa alac alai alal alat alb- alba albc albi alca alcc ali- alia alib alii alil alit all- alla alli alll alta alti at-l at-t ataa atab atac atai atal atat atca atcc atcl atia atic atil atit atla atli atta atti ba-i baaa baal baat baba babb babi bac- baca bacc baci bact baia baib baic bail bait bala balc bali ball balt bata batc bati batt bbbb bbci bblb bcaa bcat bcbc bcca bccc bcci bccl bcia bcit bctc bial biat biba bibb bibi bibl bica bicc bici bila bili bill bilt bita bitc bitt blaa blab blac blat blbt blic blit btaa btcc btcl btla bttb caaa caab caac caal caat caba cabi cac- caca cacc caci caia caib caic cail cait cala calc cali call calt cat- cata catb catc cati catt cbac cbal cbat cbbc cbca cbcc cbcl cbct cbia cbit cblb cblc cbta cbtc cbtl ccaa ccab ccac ccai ccat ccba ccbc ccca cccb cccc ccci cccl ccic ccii ccil ccla cclc ccli cctb cctc cctl cctt ciaa cial ciat ciba cibc cibi cica cicc cici cict ciia ciii ciit cila cili cill cilt cita citb citi citl citt clab clai clat clib clic clii clit cltb cltc ctab ctal ctba ctbi ctca ctia ctic ctta iaaa iaac iaai iaal iaat iaba iaca iacc iact iaia iala iall iata iatc iati ibac ibat ibca ibia ibtb ibtc ibtl icaa icab icac icai ical icat icbc icca iccb iccc icci iccl icct icll icta iiac iica iiii iiit iila iita iitt ilac ilal ilbc ilca ilia ilic ilit ill- illa illi illt itaa itac itai ital itat itia itic itil itll itta laaa laac laal laat laba labi laca lacc laci lacl lact laia laic lail lait lala lali lall lata latc lati latt lbcc lbia lcac lcat lcbc lcca lccc lcia lctl liac liat liba libc lica lict liia liii lila lilb lili lill lilt lita litb liti litl litt llat llcc lllc llll ltac ltbl ltcc ltci ltib lttc taa- taal taat taba tabb tabc tabi tabl taca tacc taci tacl tact taia tail tait tala talc tali tall tata tatb tati tatt tbca tbcb tbcc tbil tbit tbta tcca tccc tctc tiaa tiab tial tiba tibi tica ticc tiit tila till tilt tita titc titi titt tlac tlli ttab ttbb tttt