-ana aaaa aaab aaac aaan aaar aaba aabb aabc aabt aaca aacb aacc aacn aaco aacr aact aana aaon aaoo aara aarc aaro aart aata aatc aatt abaa abab abac aban abar abat abb- abba abbb abbo abbr abbt abca abcb abcc abcn abcr abct aboa abob abon aboo abor abot abra abrc abro abta ac-t acaa acab acac acan acar acat acba acca accc acco acct acoa acon acor acot acr- acra acrc acro acrr acta actc acto actt ana- anaa anab anac anan anao anar anat anba anbb anbo anca ancc anco anct anna annb anno annt ano- anoa anon anor anrc ant- anta anto antr antt aoba aoca aonb aono aont aora aorb aorn aort aotc arab arac aran arar arat arba arc- arca arco arct arna arno arnt aroa arob aron aroo aror arr- arra arrc arro arrr arrt arta artc arto artr at-t ataa atab atac atan atar atat atca atcc atco atcr atna atno atob atoc aton ator atot atra atrc atrn atro atta attn atto attr baaa baan baar baat baba babb babo babr bac- baca bacc bacn baco bact bana banc bann bano banr bant baon bar- bara barb barc barn baro barr bart bata batc batn bato batt bbbb bbrc bcaa bcar bcat bcbc bcca bccc bcor bcra bctc bnoc bnor bnrr bnta boab boac boan boar boat boba bobb bobo boca boco bona bonc bonn bono bont boob booc boon boor boot bor- bora born boro borr bort bota botb botn boto bott brab brac bran brao brat brca brcb brna brno broa brob broc bron broo bror brot brrr brtc btaa btan btcc btob btor btrc btrt bttb c-bo caaa caab caac caan caat caba cabo cac- caca cacc caco cacr cana canc cann cano cant caor cara carb carc carn caro carr cart cat- cata catb catc cato catt cbac cbar cbat cbbc cbca cbcc cbcn cbcr cbct cbna cbot cbrn cbrt cbta cbtc ccaa ccab ccac ccar ccat ccba ccbc ccbn ccca cccb cccc ccna ccnb ccnc ccnr ccob ccoc ccra ccrc ccrt cctb cctc cctt cnaa cnac cnbc cnco cnna cnrc cnrr cnrt cnta cntc cntr coan coat coba cobb cobo coca coco coct con- cona conc conn cono cont coob coon coot cor- cora corb corc corn coro corr cort cota cotb cotc cotn coto cott crab crac cran crar crat crbc crca crcc crcr crna crob croc cron croo cror crot crrt crtc ctab ctan ctba ctca ctor ctot ctrc ctrn ctta cttn naaa naab naac naan naar naat naba nabc nabo naca nacc naco nan- nana nanb nann nano nant naoc naor naot nara narc narn naro narr nart nata natc nato natt nbaa nbar nbbc nbbo nbca nbcc nbco ncaa ncac ncar ncat ncba ncbc ncca nccc nccn nccr ncct ncna ncnc ncoa ncoc ncor ncra ncrc ncta nctc nctr nnnn nnot nntn noaa noac noat noba nobc nobo noco noct non- nona nonn nono nont noo- noob noon nooo noor noot nor- nora norb norc norn noro norr nort not- nota noto nott nrab nrca nrna nroc nron nrrc nrta ntbc ntcc ntrc ntto nttr oara oban obba obbo obon obor obot obra obro ocab ocac ocan ocat ocbc occa occc occn occt ocna ocon ocra ocro ocrr oct- octa octo onab onan onar onat onc- onca onco onct onna onno onon onor onra ont- ontc onto ooaa ooba oocr oona oont oooo oora oort ootb orab orac oran orao orar orat orba orbb orbo orca orco orna ornc orno oro- oron oror orot orra orro orta ortc orto otac otan otar oto- oton otoo otor otra otro otta otto raab raan raat raba rabb rabo rac- raca racc raco ract rana ranc rann rano rant raob raoc rara rarb raro rata rato ratt rbbb rbbr rcac rcbc rcbo rccb rccc rcnr rcon rctc rnbr rnco rnnt rnot roab roan roar roat rob- roba robb robo robt roca rocc roco rona ronc rono ront roob roon roor root rora rorc roro rort rota rotc rotn roto rotr rott rrat rrna rrrr rtan rtca rtcc taa- taan taar taat taba tabb tabc tabo taca tacc taco tact tana tann tano tant taoa taor tara tarb tarc tarn taro tarr tart tata tatb tato tatr tatt tbar tbca tbcb tbcc tbrb tbta tcca tccc tcnn tcon tctc tnbc tnca tncc toab toan toat toba tobo tobt toca toco tona tonb tonn tono tooa toon toor toot tora torc torn toro torr tort tota totc toto totr tott traa trab trac tran trao trat trca trcc trna trno troa troc tron troo trot trra trtc trtr ttab ttbb ttcn tton tttt