a-ii aaaa aaaf aaai aaas aafa aaff aafi aaii aais aaoo aasa aasf aasi aass aast aata aatf aatt afaa afao afat affa affi affo affs afft afia afif afis afit afoa afoo afsa afst afta afts aiai aias aiff aifs aiia aioi aisa aisi aiso aist aita aitf aiti aits aitt aoss aotf asaa asaf asai asao asas asat asfa asfi asia asif asii asio asis asit asof asoi asos asot assa assi asso asss asst asta asti asto asts at-t ataa atai atas atat atfs atia atif atis atit atof atoi atos atot atsi atst atta atti atto atts faaa faas fafa faff fafi fafo faio fais fait fasa fasi faso fass fast fata fatf fati fato fats fatt ffff ffii ffsa ffss fftf fiaa fiaf fias fiat fifa fiff fifi fifo fift fiii fios fisa fisi fiss fist fita fiti fits fitt foaf fofo foia fois foof foos foot fosa fosi foso foss fost fota foti foto fots fott fsai fsas fsfi fsfo fsia fssa fssf fsta ftii ftos ftsa iaaa iaai iaas iaat iaff iaia iais iasa iasi iaso iata iati ifaa ifao ifas ifat ifis ifit ifsa ifso ifta ifto iias iifa iiii iiio iiis iiit iioi iioo iios iisi iist iita iitt ioii ioio ioit ioof iooi iooo ioos ioso iota iotf ioto is-a isaf isai isao isas isat isfa isia isis isit iso- isof isos issa issf issi isso isss ista isti isto ists itaa itaf itai itas itat itfa itia itif itis itof itoi itoo itos itsa itsf itsi itso itta ittf itto oafo oafs oais oasi oass oast oats ofas off- offa offo offs ofit ofst ofta oiii oios oist oita oiti ooaa ooff oofs ooia oooo ooos oosa oosi oost oots osaf osai osas osat osfa osia osii osis osoi osoo osos ossa ossi osso osta osti osts otas otif otis otit oto- otof otoo otos otsa otso otta otti otto otts s-ii s-os saaf saas saat safa saff safi safo saft saia saif sais sait saoi saos sasa sasf sasi saso sass sast sata sati sato sats satt sfas sfia sfio sfos sfss sfts siaa siaf siai sias siat sifa siff sifo sift siit sios siot sisa sisi siss sist sit- sita siti sito sits sitt soas soat sofa sofi sofo soft soia soif sois soit soof soos soot sosa sosi soso soss sost sota soto sots ssaa ssao ssas ssat ssis ssit ssot sssa sssf sssi ssss ssta ssts stai stas stat stia stif stio stis stit stoa stof stoo stos stot stsf stsi stss taa- taaf taas taat tafa taff tafi tafo taft taia taio tais tait taoa taos tasa tasi tass tast tata tati tato tats tatt tfot tfsi tfss tiaa tiaf tiao tias tifa tiff tifo tift tiit tios tisa tisi tiso tiss tist tita titi tito tits titt toas toat tofa toff tofi tofo toft tois toit tooa toof toos toot tosa tosi toso toss tost tota toti toto tots tott tsaa tsai tsao tsat tsia tsis tsoi tsos tssa tssf tssi tsst tsts ttfa ttff ttss tttt