aaaa aaab aaad aaap aaas aaba aabb aabd aabp aabt aada aads aadt aapa aaps aapt aasa aasd aass aast aata aatt abaa abab abad abap abas abat abb- abba abbb abbs abbt abda abpa abpd abpp abps abs- absa absd absp abss abta abts adaa adab adad adap adas adat adba adda addd adds adp- adps adsa adss adst adta adts apap apas apat apba apbs apda apdd apds appa appd apps appt apsa apss apta apts aptt asaa asab asad asap asas asat asba asda asds aspa aspd asps aspt assa assd assp asss asst asta astb astp asts at-t ataa atab atad atap atas atat atbs atdt atsb atst atta attp atts baaa baad baas baat baba babb babs bada badb badd bads bapa bapp baps bapt basa bass bast bata bats batt bbad bbas bbbb bbbs bbdd bdsd bpda bpsa bsaa bsap bsas bsat bsbd bspp bssd bsts btaa btbp btdt btps btss bttb daab daad daap daas daba dabb dabp dabs dabt dada dads dapa dapp daps dasa dasb dasd dass dast data datp dats datt dbas dbpd dbsa dbss dbtt dddd ddps ddss ddts dpaa dpdt dppa dpsd dpst dpts dsap dsba dsda dsdp dsps dspt dssa dssp dsst dsts dtaa dtap dtdp dtss dttp paap paas paat paba pabt pada padd pads papa papb papp paps pasa pasd pasp pass past pata patd pats patt pbpa pbsa pbsp pdas pdbs pdpa pdsa pdsd pdss ppad ppap ppds pppa pppd pppp ppps ppss ppta ppts pptt psap psas psat psbd psbt psdp psds pspp psps pssa psst psts ptab ptas ptpd ptsa ptsd saab saad saap saas saat saba sabb sabs sada sadb sadd sads sadt sapa sapp saps sasa sasd sass sast sata satb satd sats satt sbaa sbas sbbs sbds sbsa sbsd sbsp sbst sdap sdba sdds sdps sdss sp-a spad spap spas spat spdp spdt sppd spps spsa spsd spsp spss spst spta sptb spts ssaa ssab ssap ssas ssat ssdd ssdp sspa ssps sspt sssa sssb ssss ssta sstb sstd sstp ssts stab stad stap stas stat stbd stbs stds stpd stpp stps stss sttd taa- taas taat taba tabb tabs tada tads tapa tapp taps tapt tasa tasb tasp tass tast tata tatb tats tatt tbas tbbs tbsp tbst tbta tbtp tdap tddb tdss tpap tppa tppd tppp tpsa tptp tsaa tsat tsbd tsdb tsps tspt tssa tsst tsts ttab ttbb ttss tttt