a-ii aaaa aaab aaai aaas aaba aabb aabi aabt aaib aaii aais aaoo aasa aasi aass aast aata aatt abaa abab abai abas abat abb- abba abbb abbi abbo abbs abbt abia abib abis abit aboa abob aboo abos abot abs- absa absi abss abta abts aiai aias aiba aibo aiia aiib aioi aisa aisb aisi aiso aist aita aiti aits aitt aoba aoss asaa asab asai asao asas asat asba asbo asia asii asio asis asit asob asoi asos asot assa assi asso asss asst asta astb asti asto asts at-t ataa atab atai atas atat atbs atia atis atit atob atoi atos atot atsb atsi atst atta atti atto atts ba-i baaa baas baat baba babb babi babo babs baia baib baio bais bait baos basa basi baso bass bast bata bati bato bats batt bbas bbbb bbbs biao bias biat biba bibb bibi bibo bibs biis bio- bioi bios biot bis- bisa biso biss bist bita bito bits bitt boab boai boas boat boba bobb bobi bobo bobs boi- boii bois boit boob boos boot bosa bosi boso boss bost bota botb boti boto bots bott bsaa bsas bsat bsos bsts btaa btob btss bttb iaaa iaai iaas iaat iaba iaia iais iasa iasi iaso iata iati ibas ibat ibia ibis ibos ibot ibsa ibss ibtb ibts iias iiii iiio iiis iiit iioi iioo iios iisi iist iita iitt ioba iobi ioii ioio ioit iooi iooo ioos ioso iota ioto is-a isai isao isas isat isba isbt isia isis isit iso- isos issa issi isso isss ista isti isto ists itaa itai itas itat itbs itia itis itoi itoo itos itsa itsi itso itta itto oais oasi oass oast oats obai obas obba obbo obia obis obit oboi obos obot obss obst obts oiba oiii oios oist oita oiti ooaa ooba oobi ooia oooo ooos oosa oosi oost ootb oots osai osas osat osba osia osii osis osoi osoo osos ossa ossb ossi osso osta osti osts otas otbs otis otit oto- otoo otos otsa otso otta otti otto otts s-ib s-ii s-os saab saas saat saba sabb sabi sabo sabs saia sais sait saoi saos sasa sasi saso sass sast sata satb sati sato sats satt sbaa sbai sbas sbbs sbia sbot sbsa sbsi sbst siaa siab siai sias siat siba sibi sibo sibs siit sios siot sisa sisi siss sist sit- sita siti sito sits sitt soas soat soba sobo sobs sobt soia sois soit soos soot sosa sosi soso soss sost sota soto sots ssaa ssab ssao ssas ssat ssis ssit ssot sssa sssb sssi ssss ssta sstb ssts stab stai stas stat stbs stia stib stio stis stit stoa stob stoo stos stot stsi stss taa- taas taat taba tabb tabi tabo tabs taia taio tais tait taoa taos tasa tasb tasi tass tast tata tatb tati tato tats tatt tbas tbbs tbit tbst tbta tiaa tiab tiao tias tiba tibi tibs tiit tios tisa tisb tisi tiso tiss tist tita titi tito tits titt toab toas toat toba tobi tobo tobs tobt tois toit tooa toos toot tosa tosb tosi toso toss tost tota toti toto tots tott tsaa tsai tsao tsat tsia tsis tsob tsoi tsos tssa tssi tsst tsts ttab ttbb ttss tttt