a-ii aaaa aaab aaaf aaai aaas aaba aabb aabi aabt aafa aafb aaff aafi aaib aaii aais aasa aasf aasi aass aast aata aatf aatt abaa abab abaf abag abai abas abat abb- abba abbb abbi abbs abbt abff abia abib abig abis abit abs- absa absf absi abss abta abts afaa afat afbs affa affi affs afft afgf afia afib afif afig afis afit afsa afsb afst afta afts agag agai agas agat agba agfa agga aggi agia agib agig agii agis agit agsa agsg agst agta agts aiai aias aiba aiff aifs aiga aiia aiib aisa aisb aisg aisi aist aita aitf aiti aits aitt asaa asab asaf asag asai asas asat asba asfa asfi asgt asia asif asii asis asit assa assi asss asst asta astb asti asts at-t ataa atab atai atas atat atbs atfb atfs atia atif atis atit atsb atsi atst atta atti atts ba-i baaa baaf baas baat baba babb babi babs baff baft baga bagg bagi bags bagt baia baib baig bais bait basa basf basi bass bast bata batf bati bats batt bbas bbbb bbbs bbga bfas bffs bfgf bfsi bfta bfts bftt bggs bgia bgst biaf bias biat biba bibb bibi bibs bifa biff bifi biga bigb bigg bigs bigt biis bis- bisa biss bist bita bits bitt bsaa bsas bsat bsfa bsff bsfs bsgs bsts btaa btaf btss bttb faaa faas faba fabi fabs fafa faff fafg fafi fagg fagi fags fais fait fasa fasi fass fast fata fatf fati fats fatt fbis ffff ffii ffsa ffss fftf fgts fiaa fiaf fias fiat fiba fibs fifa fiff fifi fift figa figg figs fiii fisa fisi fiss fist fita fiti fits fitt fsai fsas fsfi fsgs fsia fssa fssf fsta ftii ftsa gaas gaba gabb gabi gabs gabt gafa gafb gaff gafi gaft gaga gagg gagi gags gaia gaig gais gait gasa gasb gasi gass gast gata gati gats gatt gbag gbas gbbs gffa ggbt ggfg gggg ggss giaa giai gias giat giba gibb gibs giff gifs gift giga gigg gigi gigs giis gisa giss gist gita gits gsab gsat gsif gsis gtaa gtta iaaa iaai iaas iaat iaba iaff iags iaia iais iasa iasi iata iati ibas ibat ibfi ibga ibia ibis ibsa ibsf ibss ibtb ibts ifaa ifas ifat ifbb ifis ifit ifsa ifsb ifta igas igba igfa igga iggs igia igis iias iifa iiii iiis iiit iisi iist iita iitt is-a isaf isai isas isat isba isbt isfa isia isis isit issa issf issi isss ista isti ists itaa itaf itai itas itat itbs itfa itgs itia itif itis itsa itsf itsi itta ittf s-ib s-ii saab saaf saag saas saat saba sabb sabi sabs safa safb saff safi saft saga sagg sagi sags sagt saia saif sais sait sasa sasf sasi sass sast sata satb satg sati sats satt sbaa sbai sbas sbbs sbia sbig sbsa sbsi sbst sfas sfba sfia sfss sfts sgaa sggg sggs sgss sgta sgts siaa siab siaf siag siai sias siat siba sibi sibs sifa siff sift siga sigg sigi sigs siit sisa sisi siss sist sit- sita siti sits sitt ssaa ssab ssas ssat ssgs ssgt ssis ssit sssa sssb sssf sssi ssss ssta sstb ssts stab stag stai stas stat stbs stia stib stif stig stis stit stsf stsi stss taa- taaf taag taas taat taba tabb tabi tabs tafa taff tafi taft taga tagg tagi tags taia taig tais tait tasa tasb tasi tass tast tata tatb tati tats tatt tbaf tbas tbbs tbgs tbit tbst tbta tfsi tfss tgfa tgif tgts tiaa tiab tiaf tias tiba tibi tibs tifa tiff tift tiga tigi tigs tiit tisa tisb tisi tiss tist tita titi tits titt tsaa tsai tsat tsgt tsia tsig tsis tssa tssf tssg tssi tsst tsts ttab ttbb ttfa ttff ttss tttt