aaaa aaab aaad aaaf aaas aaba aabb aabd aabt aada aads aadt aafa aafb aafd aaff aasa aasd aasf aass aast aata aatf aatt abaa abab abad abaf abas abat abb- abba abbb abbs abbt abda abff abs- absa absd absf abss abta abts adaa adab adad adas adat adba adda addd adds adfa adfs adsa adss adst adta adts afaa afad afat afbs afdb affa affs afft afsa afsb afst afta afts asaa asab asad asaf asas asat asba asda asdf asds asfa assa assd asss asst asta astb asts at-t ataa atab atad atas atat atbs atdt atfb atfs atsb atst atta atts baaa baad baaf baas baat baba babb babs bada badb badd bads baff baft basa basf bass bast bata batf bats batt bbad bbas bbbb bbbs bbdd bdsd bfas bffs bfta bfts bftt bsaa bsas bsat bsbd bsfa bsff bsfs bssd bsts btaa btaf btdt btss bttb daab daad daas daba dabb dabs dabt dada dads dafa daff dafs daft dasa dasb dasd dass dast data dats datt dbas dbfs dbsa dbss dbtt dddd ddss ddts dfaf dfas dfds dfdt dffa dfts dsba dsda dsfa dssa dsst dsts dtaa dtss faaa faad faas faba fabd fabs fada fadd fads fafa faff fasa fasd fass fast fata fatf fats fatt fbsd fdst ffff ffsa ffss fftf fsas fssa fssf fsta ftsa saab saad saaf saas saat saba sabb sabs sada sadb sadd sads sadt safa safb saff saft sasa sasd sasf sass sast sata satb satd sats satt sbaa sbas sbbs sbds sbsa sbsd sbst sdba sdds sdsf sdss sfas sfba sfss sfts ssaa ssab ssas ssat ssdd ssdf sssa sssb sssf ssss ssta sstb sstd ssts stab stad stas stat stbd stbs stds stsf stss sttd taa- taaf taas taat taba tabb tabs tada tads tafa taff taft tasa tasb tass tast tata tatb tats tatt tbaf tbas tbbs tbst tbta tddb tdff tdss tfsd tfss tsaa tsat tsbd tsdb tssa tssf tsst tsts ttab ttbb ttfa ttff ttss tttt