a-a a-b a-i a-t aaa aab aai aap aar aas aat ab- aba abb abi abp abr abs abt ai- aia aib aii aip air ais ait ap- apa apb api app apr aps apt ar- ara arb ari arp arr ars art as- asa asb asi asp asr ass ast at- ata atb ati atp atr ats att b-p baa bab bai bap bar bas bat bba bbb bbi bbp bbr bbs bbt bi- bia bib bii bip bir bis bit bpa bpb bpi bpp bpr bps bpt bra brb bri brp brr brs brt bsa bsb bsi bsp bsr bss bst bta btb bti btp btr bts btt ia- iaa iab iai iap iar ias iat iba ibb ibi ibp ibr ibs ibt iia iib iii iip iir iis iit ipa ipb ipi ipp ipr ips ipt ir- ira irb iri irp irr irs irt is- isa isb isi isp isr iss ist ita itb iti itp its itt p-p paa pab pai pap par pas pat pba pbb pbi pbp pbr pbs pbt pia pib pii pip pir pis pit ppa ppb ppi ppp ppr pps ppt pra prb pri prp prr prs prt ps- psa psb psi psp psr pss pst pt- pta ptb pti ptp ptr pts ptt ra- raa rab rai rap rar ras rat rba rbb rbi rbp rbr rbs rbt ria rib rii rip rir ris rit rpa rpb rpi rpp rpr rps rpt rra rrb rri rrp rrr rrs rrt rsa rsb rsi rsp rsr rss rst rta rtb rti rtp rtr rts rtt saa sab sai sap sar sas sat sba sbb sbi sbp sbr sbs sbt sia sib sii sip sir sis sit spa spb spi spp spr sps spt sr- sra srb sri srp srr srs srt ss- ssa ssb ssi ssp ssr sss sst sta stb sti stp str sts stt taa tab tai tap tar tas tat tba tbb tbi tbp tbr tbs tbt tia tib tii tip tir tis tit tpa tpb tpi tpp tpr tps tpt tra trb tri trp trr trs trt tsa tsb tsi tsp tsr tss tst tta ttb tti ttp ttr tts ttt

a-ii aaaa aaab aaai aaap aaar aaas aaba aabb aabi aabp aabt aaib aaii aais aapa aapi aaps aapt aara aari aarp aars aart aasa aasi aass aast aata aatt abaa abab abai abap abar abas abat abb- abba abbb abbi abbr abbs abbt abia abib abir abis abit abpa abpi abpp abpr abps abra abri abrs abs- absa absi absp abss abta abts aiai aias aiba aiia aiib aiir aipa aipi aips aira airi airp airs airt aisa aisb aisi aisr aist aita aiti aitr aits aitt apai apap apar apas apat apba apbr apbs api- apia apip apis apit appa appr apps appt apra apri aprs aprt apsa apsi apss apta apti apts aptt arab arai arap arar aras arat arba arbi arbs aria arib arii arip aris arit arpa arpi arps arr- arra arri arrr arrs arrt ars- arsa arsi arst arta arti artr arts asaa asab asai asap asar asas asat asba asia asii asip asir asis asit aspa aspi aspr asps aspt asra asrs assa assi assp assr asss asst asta astb asti astp astr asts at-t ataa atab atai atap atar atas atat atbs atia atip atis atit atpr atra atri atrp atsb atsi atst atta atti attp attr atts ba-i baaa baar baas baat baba babb babi babr babs baia baib bair bais bait bapa bapi bapp baps bapt bar- bara barb bari barr bars bart basa basi bass bast bata bati bats batt bbas bbbb bbbs bbpr biap biar bias biat biba bibb bibi bibs biis bipa bipp bips bira birb biri birr birs birt bis- bisa bisp biss bist bita bits bitt bpai bpsa bpti brab brai bras brat bria bris brit brrr brrs brsb brsr brst bsaa bsap bsas bsat bspp bspr bsra bsts btaa btbp btps btrt btss bttb iaaa iaai iaap iaas iaat iaba iaia iais iapa iapp iaps iapt iara iars iart iasa iasi iasp iasr iata iati ibar ibas ibat ibia ibis ibra ibri ibsa ibss ibtb ibts iias iiii iiis iiit iipa iira iirs iisi iisp iisr iist iita iitr iitt ipas ipat ipba ippa ippr ipri ipsa ipsi ipsp ipss ipta ipts irai irap irar iras irbp iri- iria irip iris irpa irps irra irri irrs irsa irsp irta irti irtp irts is-a isai isar isas isat isba isbt isia isis isit ispa ispr isps isra isri isrp issa issi issp issr isss ista isti istp istr ists itaa itai itap itar itas itat itbs itia itis itpa itra itri itrs itsa itsi itsp itta paap paar paas paat paba pabt paia paib paip pair pais pait papa papb papi papp papr paps par- para pari parp parr pars part pasa pasi pasp pass past pata pati patr pats patt pbar pbpa pbrs pbsa pbsp piai pias piat pibb pibi piia piip pipa pipi pipp pips pira piri pirr pirs pisa pisi piss pist pita piti pitr pits pitt ppap ppar ppib pppa pppp ppps ppss ppta ppts pptt prai prar pras prat prbs pri- pria prii pris prps prri prrs prsa prsi prss prti prtp prtr psap psas psat psbr psbt psia psip psis pspi pspp pspr psps psrp pssa psst psts ptab ptas ptsa raab raas raat raba rabb rabi rabs raia raii raip rair rais rait rapa rapi rapp raps rapt rara rarb rari rars rasa rasi rasp rass rast rata rati ratp rats ratt rbbb rbbr rbbs rbis rbsp rbss rbst riaa riab riai rias riat rib- riba ribs riia riis ripa ripi ripp ripr rips ript riri rirs risa risi risp riss rist rita riti rits ritt rpii rpps rpta rpts rras rrat rrrr rrsp rsaa rsai rsbi rsis rspb rsps rssa rstp rsts rtai rtas rtpa rtps rtss rttp rtts s-ib s-ii saab saap saar saas saat saba sabb sabi sabr sabs saia saip sair