-ana aaaa aaab aaac aaan aaba aabb aabc aabt aaca aacb aacc aacn aaco aact aana aaon aaoo aata aatc aatt abaa abab abac aban abat abb- abba abbb abbo abbt abca abcb abcc abcn abct aboa abob abon aboo abot abta ac-t acaa acab acac acan acat acba acca accc acco acct acoa acon acot acta actc acto actt ana- anaa anab anac anan anao anat anba anbb anbo anca ancc anco anct anna annb anno annt ano- anoa anon ant- anta anto antt aoba aoca aonb aono aont aotc at-t ataa atab atac atan atat atca atcc atco atna atno atob atoc aton atot atta attn atto baaa baan baat baba babb babo bac- baca bacc bacn baco bact bana banc bann bano bant baon bata batc batn bato batt bbbb bcaa bcat bcbc bcca bccc bctc bnoc bnta boab boac boan boat boba bobb bobo boca boco bona bonc bonn bono bont boob booc boon boot bota botb botn boto bott btaa btan btcc btob bttb c-bo caaa caab caac caan caat caba cabo cac- caca cacc caco cana canc cann cano cant cat- cata catb catc cato catt cbac cbat cbbc cbca cbcc cbcn cbct cbna cbot cbta cbtc ccaa ccab ccac ccat ccba ccbc ccbn ccca cccb cccc ccna ccnb ccnc ccob ccoc cctb cctc cctt cnaa cnac cnbc cnco cnna cnta cntc coan coat coba cobb cobo coca coco coct con- cona conc conn cono cont coob coon coot cota cotb cotc cotn coto cott ctab ctan ctba ctca ctot ctta cttn naaa naab naac naan naat naba nabc nabo naca nacc naco nan- nana nanb nann nano nant naoc naot nata natc nato natt nbaa nbbc nbbo nbca nbcc nbco ncaa ncac ncat ncba ncbc ncca nccc nccn ncct ncna ncnc ncoa ncoc ncta nctc 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 ntto oban obba obbo obon obot ocab ocac ocan ocat ocbc occa occc occn occt ocna ocon oct- octa octo onab onan onat onc- onca onco onct onna onno onon ont- ontc onto ooaa ooba oona oont oooo ootb otac otan oto- oton otoo otta otto taa- taan taat taba tabb tabc tabo taca tacc taco tact tana tann tano tant taoa tata tatb tato tatt tbca tbcb tbcc tbta tcca tccc tcnn tcon tctc tnbc tnca tncc toab toan toat toba tobo tobt toca toco tona tonb tonn tono tooa toon toot tota totc toto tott ttab ttbb ttcn tton tttt