-ana aaaa aaab aaac aaaf aaan aaba aabb aabc aabt aaca aacb aacc aacf aacn aaco aact aafa aafb aafc aaff aana aaon aaoo aata aatc aatf aatt abaa abab abac abaf aban abat abb- abba abbb abbo abbt abca abcb abcc abcf abcn abct abff aboa abob abof abon aboo abot abta ac-t acaa acab acac acan acat acba acca accc accf acco acct acfc acft acoa acon acot acta actc actf acto actt afaa afan afao afat afca afcb afcc affa affc affo afft afoa afoo afta aftc aftn ana- anaa anab anac anan anao anat anba anbb anbo anca ancc anco anct anfa anfo anna annb anno annt ano- anoa anon ant- anta anto antt aoba aoca aonb aono aont aotc aotf at-t ataa atab atac atan atat atca atcc atcf atco atfb atfc atna atno atob atoc atof aton atot atta attn atto baaa baaf baan baat baba babb babo bac- baca bacc bacn baco bact bafc baff bafo baft bana banc bann bano bant baon bata batc batf batn bato batt bbbb bbfc bbfn bcaa bcat bcbc bcca bccc bcfc bcof bctc bfca bfta bftt bnoc bnta boab boac boan boat boba bobb bobo boca boco bofa boff bona bonc bonn bono bont boob booc boof boon boot bota botb botn boto bott btaa btaf btan btcc btfc btob bttb c-bo caaa caab caac caaf caan caat caba cabf cabo cac- caca cacc caco cafa cafb cafc caff cana canc cann cano cant cat- cata catb catc catf cato catt cbac cbat cbbc cbca cbcc cbcn cbct cbfb cbfc cbna cbot cbta cbtc cbtf ccaa ccab ccac ccaf ccat ccba ccbc ccbn ccca cccb cccc cccf ccfa ccfc ccff ccna ccnb ccnc ccnf ccob ccoc cctb cctc cctt cfaa cfab cfac cfao cfbc cfbn cfbt cfca cfcb cfcf cfcn cfco cffb cfnb cfoa cfta cftc cnaa cnac cnbc cnco cnfa cnna cnta cntc cntf coan coat coba cobb cobo coca coco coct cofc coff coft con- cona conc conf conn cono cont coob coof coon coot cota cotb cotc cotn coto cott ctab ctan ctba ctca ctcf ctfc ctfo ctot ctta cttn faaa faac faan faba fabo faca facc fact fafa fafc faff fafo fana fanc fano fant faon fata fatc fatf fato fatt fcab fcat fcba fcca fccf fcot fcto ffcc ffff fftf fnac fnta fntb foaf foan foba fobt foca foco fofo fono font foof foon foot fota foto fott ft-c ftan ftfc naaa naab naac naan naat naba nabc nabf nabo naca nacc nacf naco nafa nafc naff nafo nan- nana nanb nann nano nant naoc naot nata natc nato natt nbaa nbaf nbbc nbbo nbca nbcc nbco nbfa nbfc ncaa ncac ncat ncba ncbc ncca nccc nccf nccn ncct ncfc ncna ncnc ncoa ncoc ncta nctc nfaa nfat nfct nfff nfon nfta nftc nfto nnnn nnot nntn noaa noac noat noba nobc nobo noco noct non- nona nonn nono nont noo- noob noon nooo noot not- nota noto nott ntbc ntcc ntfc ntof ntto oafc oafo oban obba obbo obon obot ocab ocac ocan ocat ocbc occa occc occn occt ocfa ocna ocon oct- octa octo ofan off- offa offc offo ofna ofno ofta onab onan onat onc- onca oncf onco onct onna onno onon ont- ontc onto ooaa ooba ooff oona oont oooo ootb otac otan otfc oto- otof oton otoo otta otto taa- taaf taan taat taba tabb tabc tabo taca tacc taco tact tafa tafc taff tafo taft tana tann tano tant taoa tata tatb tato tatt tbaf tbca tbcb tbcc tbnf tbta tcca tccc tcfc tcnn tcon tctc tfca tfot tftc tnbc tnca tncc tnfc toab toan toat toba tobo tobt toca toco tofa toff tofo toft tona tonb tonn tono tooa toof toon toot tota totc toto tott ttab ttbb ttcn ttfa ttfc ttff ttfn tton tttt