-ana aaaa aaab aaac aaal aaan aaba aabb aabc aabl aabt aaca aacb aacc aacl aacn aact aala aalc aall aana aata aatc aatt abaa abab abac abal aban abat abb- abba abbb abbt abca abcb abcc abcl abcn abct abla abta ac-t acaa acab acac acan acat acba acbl acca accc acct acla aclc acta actc actl actt alaa alac alal alan alat alb- alba albc alca alcc all- alla alll alln alna alta altn ana- anaa anab anac anal anan anat anba anbb anbl anca ancc anct anla anlc anln anna annb annt ant- anta antl antt at-l at-t ataa atab atac atal atan atat atca atcc atcl atla atna atta attn baaa baal baan baat baba babb bac- baca bacc bacn bact bala balc ball balt bana banc bann bant bata batc batn batt bbbb bblb bcaa bcat bcbc bcca bccc bccl bctc blaa blab blac blan blat blbt bnta btaa btan btcc btcl btla bttb caaa caab caac caal caan caat caba cac- caca cacc cala calc call calt cana canc cann cant cat- cata catb catc catt cbac cbal cbat cbbc cbca cbcc cbcl cbcn cbct cblb cblc cbln cbna cbta cbtc cbtl ccaa ccab ccac ccat ccba ccbc ccbn ccca cccb cccc cccl ccla cclc ccna ccnb ccnc cctb cctc cctl cctt clab clan clat cltb cltc cnaa cnac cnbc cnbl cnna cnta cntc ctab ctal ctan ctba ctca ctta cttn laaa laac laal laan laat laba laca lacc lacl lact lala lall lan- lana lanc lann lant lata latc latn latt lbcc lcac lcat lcbc lcca lccc lctl llan llat llcc lllc llll lntc ltac ltbl ltcc ltnt lttc naaa naab naac naal naan naat naba nabc nabl naca nacc nacl nala nalc nall nalt nan- nana nanb nann nant nata natc natl natt nbaa nbbc nbca nbcc ncaa ncac ncat ncba ncbc ncca nccc nccn ncct nclc ncln ncna ncnc ncta nctc nlab nlat nlcc nnnn nntn ntbc ntcc ntla taa- taal taan taat taba tabb tabc tabl taca tacc tacl tact tala talc tall tana tann tant tata tatb tatt tbca tbcb tbcc tbta tcca tccc tcnn tctc tlac tnbc tnca tncc tnla ttab ttbb ttcn tttt