a-a a-b a-i a-t aaa aab aaf aai aar aas aat ab- aba abb abf abi abr abs abt af- afa afb aff afi afr afs aft ai- aia aib aif aii air ais ait ar- ara arb arf ari arr ars art as- asa asb asf asi asr ass ast at- ata atb atf ati atr ats att baa bab baf bai bar bas bat bba bbb bbf bbi bbr bbs bbt bfa bfb bff bfi bfr bfs bft bi- bia bib bif bii bir bis bit bra brb brf bri brr brs brt bsa bsb bsf bsi bsr bss bst bta btb btf bti btr bts btt faa fab faf fai far fas fat fba fbb fbf fbi fbr fbs fbt ffa fff ffi ffr ffs fft fia fib fif fii fir fis fit fra frb frf fri frr frs frt fsa fsb fsf fsi fsr fss fst fta ftb ftf fti ftr fts ftt i-f ia- iaa iab iaf iai iar ias iat iba ibb ibf ibi ibr ibs ibt ifa ifb iff ifi ifr ifs ift iia iib iif iii iir iis iit ir- ira irb irf iri irr irs irt is- isa isb isf isi isr iss ist ita itb itf iti its itt ra- raa rab raf rai rar ras rat rba rbb rbf rbi rbr rbs rbt rfa rfb rff rfi rfr rfs rft ria rib rif rii rir ris rit rra rrb rrf rri rrr rrs rrt rsa rsb rsf rsi rsr rss rst rta rtb rtf rti rtr rts rtt saa sab saf sai sar sas sat sba sbb sbf sbi sbr sbs sbt sfa sfb sff sfi sfr sfs sft sia sib sif sii sir sis sit sr- sra srb srf sri srr srs srt ss- ssa ssb ssf ssi ssr sss sst sta stb stf sti str sts stt taa tab taf tai tar tas tat tba tbb tbf tbi tbr tbs tbt tfa tfb tff tfi tfr tfs tft tia tib tif tii tir tis tit tra trb trf tri trr trs trt tsa tsb tsf tsi tsr tss tst tta ttb ttf tti ttr tts ttt

a-ii aaaa aaab aaaf aaai aaar aaas aaba aabb aabi aabt aafa aafb aaff aafi aaib aaii aais aara aari aars aart aasa aasf aasi aass aast aata aatf aatt abaa abab abaf abai abar abas abat abb- abba abbb abbi abbr abbs abbt abff abia abib abir abis abit abra abri abrs abs- absa absf absi abss abta abts afaa afar afat afbs affa affi affs afft afia afib afif afir afis afit afr- afra afri afrs afsa afsb afst afta afts aiai aias aiba aiff aifs aiia aiib aiir aira airi airs airt aisa aisb aisi aisr aist aita aitf aiti aitr aits aitt arab araf arai arar aras arat arba arbi arbs arfa arfb arff arfs arft aria arib arif arii aris arit arr- arra arri arrr arrs arrt ars- arsa arsi arst arta arti artr arts asaa asab asaf asai asar asas asat asba asfa asfi asia asif asii asir asis asit asra asrs assa assi assr asss asst asta astb asti astr asts at-t ataa atab atai atar atas atat atbs atfb atfs atia atif atis atit atra atri atsb atsi atst atta atti attr atts ba-i baaa baaf baar baas baat baba babb babi babr babs baff baft baia baib bair bais bait bar- bara barb barf bari barr bars bart basa basf basi bass bast bata batf bati bats batt bbas bbbb bbbs bfas bffs bfsi bfsr bfta bfts bftt biaf biar bias biat biba bibb bibi bibs bifa biff bifi biis bira birb biri birr birs birt bis- bisa biss bist bita bits bitt brab braf brai bras brat bria bris brit brrr brrs brsb brsr brst bsaa bsas bsat bsfa bsff bsfs bsra bsts btaa btaf btrt btss bttb faaa faas faba fabi fabs fafa faff fafi fair fais fait fara farb farr fars fart fasa fasi fass fast fata fatf fati fats fatt fbar fbis fbrs ffar ffff ffii ffrr ffsa ffss fftf fiaa fiaf fiar fias fiat fiba fibs fifa fiff fifi fift fiii fira firs fisa fisi fiss fist fita fiti fits fitt frab fras frat fria frib fris frit frsb frst frta fsai fsas fsfi fsia fsra fssa fssf fsta ftii ftrs ftsa ftsr iaaa iaai iaas iaat iaba iaff iaia iais iara iars iart iasa iasi iasr iata iati ibar ibas ibat ibfi ibia ibis ibra ibri ibsa ibsf ibss ibtb ibts ifaa ifar ifas ifat ifbb ifis ifit ifra ifrb ifrf ifri ifsa ifsb ifta iias iifa iiii iiis iiit iira iirs iisi iisr iist iita iitr iitt iraf irai irar iras iri- iria iris irra irri irrs irsa irsf irta irtf irti irts is-a isaf isai isar isas isat isba isbt isfa isia isis isit isra isri issa issf issi issr isss ista isti istr ists itaa itaf itai itar itas itat itbs itfa itia itif itis itra itrf itri itrs itsa itsf itsi itta ittf raab raaf raas raat raba rabb rabi rabs rafa raff rafi raft raia raif raii rair rais rait rara rarb rarf rari rars rasa rasi rass rast rata ratf rati rats ratt rbaf rbbb rbbr rbbs rbis rbss rbst riaa riab riai rias riat rib- riba ribs rifa riff rifs rift riia riif riis riri rirs risa risi riss rist rita riti rits ritt rras rrat rrif rrrr rsaa rsaf rsai rsbi rsis rssa rsts rtai rtas rtbf rtfb rtss rtts s-ib s-ii saab saaf saar saas saat saba sabb sabi sabr sabs safa safb saff safi safr saft saia saif sair sais sait sara sarf sari sarr sars sart sasa sasf sasi sass sast sata satb sati satr sats satt sbaa sbai sbar sbas sbbs sbia sbsa sbsi sbst sfar sfas sfba sfia sfra sfss sfts siaa siab siaf siai sias siat siba sibi sibs sifa siff sifr sift siit sira sirf siri sirr sirs sirt sisa sisi