a-a a-b a-i a-t aaa aab aag aai aar aas aat ab- aba abb abg abi abr abs abt ag- aga agb agg agi agr ags agt ai- aia aib aig aii air ais ait ar- ara arb arg ari arr ars art as- asa asb asg asi asr ass ast at- ata atb atg ati atr ats att baa bab bag bai bar bas bat bba bbb bbg bbi bbr bbs bbt bga bgb bgg bgi bgr bgs bgt bi- bia bib big bii bir bis bit bra brb brg bri brr brs brt bsa bsb bsg bsi bsr bss bst bta btb btg bti btr bts btt gaa gab gag gai gar gas gat gba gbg gbi gbr gbs gbt gga ggb ggg ggi ggr ggs ggt gia gib gig gii gir gis git gra grb grg gri grr grs grt gsa gsb gsg gsi gsr gss gst gta gtb gtg gti gtr gts gtt ia- iaa iab iag iai iar ias iat iba ibb ibg ibi ibr ibs ibt iga igb igg igi igr igs igt iia iib iii iir iis iit ir- ira irb irg iri irr irs irt is- isa isb isg isi isr iss ist ita itb itg iti its itt ra- raa rab rag rai rar ras rat rba rbb rbg rbi rbr rbs rbt rga rgb rgg rgi rgr rgs rgt ria rib rig rii rir ris rit rra rrb rrg rri rrr rrs rrt rsa rsb rsg rsi rsr rss rst rta rtb rtg rti rtr rts rtt saa sab sag sai sar sas sat sba sbb sbg sbi sbr sbs sbt sga sgb sgg sgi sgr sgs sgt sia sib sig sii sir sis sit sr- sra srb srg sri srr srs srt ss- ssa ssb ssg ssi ssr sss sst sta stb stg sti str sts stt taa tab tag tai tar tas tat tba tbb tbg tbi tbr tbs tbt tga tgb tgg tgi tgr tgs tgt tia tib tig tii tir tis tit tra trb trg tri trr trs trt tsa tsb tsg tsi tsr tss tst tta ttb ttg tti ttr tts ttt

a-ii aaaa aaab aaai aaar aaas aaba aabb aabi aabt aaib aaii aais aara aari aars aart aasa aasi aass aast aata aatt abaa abab abag abai abar abas abat abb- abba abbb abbi abbr abbs abbt abia abib abig abir abis abit abra abri abrs abs- absa absi abss abta abts agag agai agar agas agat agba agga aggi agia agib agig agii agir agis agit agra agri agsa agsg agst agta agtr agts aiai aias aiba aiga aiia aiib aiir aira airi airs airt aisa aisb aisg aisi aisr aist aita aiti aitr aits aitt arab arag arai arar aras arat arba arbi arbs arga argb argi args aria arib arig arii aris arit arr- arra arrg arri arrr arrs arrt ars- arsa arsi arst arta arti artr arts asaa asab asag asai asar asas asat asba asgt asia asii asir asis asit asra asrg asrs assa assi assr asss asst asta astb asti astr asts at-t ataa atab atai atar atas atat atbs atia atis atit atra atri atsb atsi atst atta atti attr atts ba-i baaa baar baas baat baba babb babi babr babs baga bagg bagi bags bagt baia baib baig bair bais bait bar- bara barb barg bari barr bars bart basa basi bass bast bata bati bats batt bbas bbbb bbbs bbga bbrg bggs bgia bgst biar bias biat biba bibb bibi bibs biga bigb bigg bigs bigt biis bira birb birg biri birr birs birt bis- bisa biss bist bita bits bitt brab brag brai bras brat bria brig bris brit brrr brrs brsb brsr brst bsaa bsas bsat bsgs bsra bsts btaa btrt btss bttb gaar gaas gaba gabb gabi gabr gabs gabt gaga gagg gagi gags gaia gaig gair gais gait gara garb garg gari garr gars gart gasa gasb gasi gasr gass gast gata gati gatr gats gatt gbag gbas gbbs ggbt gggg ggss giaa giai gias giat giba gibb gibs giga gigg gigi gigs giis gira girg giri girr girs girt gisa giss gist gita gits grab grai gras grat grbr gria grib grig gris grit grrr grrs grss gsab gsat gsis gstr gtaa gtbr gtta iaaa iaai iaas iaat iaba iags iaia iais iara iars iart iasa iasi iasr iata iati ibar ibas ibat ibga ibia ibis ibra ibri ibsa ibss ibtb ibts igar igas igba igga iggs igia igis igra igri iias iiii iiis iiit iira iirs iisi iisr iist iita iitr iitt irai irar iras irgs iri- iria irig iris irra irri irrs irsa irsg irta irti irts is-a isai isar isas isat isba isbt isia isis isit isra isrg isri issa issi issr isss ista isti istr ists itaa itai itar itas itat itbs itgs itia itis itra itri itrs itsa itsi itta raab raag raas raat raba rabb rabi rabs raga ragg ragi rags raia raig raii rair rais rait rara rarb rari rars rasa rasi rass rast rata rati rats ratt rbbb rbbr rbbs rbis rbss rbst rgba rgbi rgit rgtr rgts riaa riab riai rias riat rib- riba ribs riga rigg rigi rigs riia riis riri rirs risa risi riss rist rita riti rits ritt rras rrat rrrr rsaa rsai rsbi rsgb rsis rssa rsts rtai rtas rtgs rtss rtts s-ib s-ii saab saag saar saas saat saba sabb sabi sabr sabs saga sagg sagi sags sagt saia sair sais sait sara sarg sari sarr sars sart sasa sasi sass sast sata satb satg sati satr sats satt sbaa sbai sbar sbas sbbs sbia sbig sbsa sbsi sbst sgaa sggg sggs sgss sgta sgts siaa siab siag siai sias siat siba sibi sibs siga sigg sigi sigs siit sira siri sirr sirs sirt sisa sisi siss sist sit- sita siti sits sitt sras srgb srib sris srta srtr ssaa ssab ssas ssat ssbr ssgs ssgt ssis ssit ssra ssrg ssri ssrs sssa sssb sssi