-ana aaaa aaab aaac aaan aaar aaba aabb aabc aabt aaca aacb aacc aacn aacr aact aana aara aarc aart aata aatc aatt abaa abab abac aban abar abat abb- abba abbb abbr abbt abca abcb abcc abcn abcr abct abra abrc abta ac-t acaa acab acac acan acar acat acba acca accc acct acr- acra acrc acrr acta actc actt ana- anaa anab anac anan anar anat anba anbb anca ancc anct anna annb annt anrc ant- anta antr antt arab arac aran arar arat arba arc- arca arct arna arnt arr- arra arrc arrr arrt arta artc artr at-t ataa atab atac atan atar atat atca atcc atcr atna atra atrc atrn atta attn attr baaa baan baar baat baba babb babr bac- baca bacc bacn bact bana banc bann banr bant bar- bara barb barc barn barr bart bata batc batn batt bbbb bbrc bcaa bcar bcat bcbc bcca bccc bcra bctc bnrr bnta brab brac bran brat brca brcb brna brrr brtc btaa btan btcc btrc btrt bttb caaa caab caac caan caat caba cac- caca cacc cacr cana canc cann cant cara carb carc carn carr cart cat- cata catb catc catt cbac cbar cbat cbbc cbca cbcc cbcn cbcr cbct cbna cbrn cbrt cbta cbtc ccaa ccab ccac ccar ccat ccba ccbc ccbn ccca cccb cccc ccna ccnb ccnc ccnr ccra ccrc ccrt cctb cctc cctt cnaa cnac cnbc cnna cnrc cnrr cnrt cnta cntc cntr crab crac cran crar crat crbc crca crcc crcr crna crrt crtc ctab ctan ctba ctca ctrc ctrn ctta cttn naaa naab naac naan naar naat naba nabc naca nacc nan- nana nanb nann nant nara narc narn narr nart nata natc natt nbaa nbar nbbc nbca nbcc ncaa ncac ncar ncat ncba ncbc ncca nccc nccn nccr ncct ncna ncnc ncra ncrc ncta nctc nctr nnnn nntn nrab nrca nrna nrrc nrta ntbc ntcc ntrc nttr raab raan raat raba rabb rac- raca racc ract rana ranc rann rant rara rarb rata ratt rbbb rbbr rcac rcbc rccb rccc rcnr rctc rnbr rnnt rrat rrna rrrr rtan rtca rtcc taa- taan taar taat taba tabb tabc taca tacc tact tana tann tant tara tarb tarc tarn tarr tart tata tatb tatr tatt tbar tbca tbcb tbcc tbrb tbta tcca tccc tcnn tctc tnbc tnca tncc traa trab trac tran trat trca trcc trna trra trtc trtr ttab ttbb ttcn tttt