a-ii aaaa aaab aaai aaar aaas aaba aabb aabi aabt aaib aaii aais aaoo aara aari aaro aars aart aasa aasi aass aast aata aatt abaa abab abai abar abas abat abb- abba abbb abbi abbo abbr abbs abbt abia abib abir abis abit aboa abob aboo abor abos abot abra abri abro abrs abs- absa absi abss abta abts aiai aias aiba aibo aiia aiib aiir aioi aira airi airo airs airt aisa aisb aisi aiso aisr aist aita aiti aitr aits aitt aoba aora aorb aors aort aoss arab arai arar aras arat arba arbi arbs aria arib arii ario aris arit aroa arob aroi aroo aror aros arr- arra arri arro arrr arrs arrt ars- arsa arsi arso arst arta arti arto artr arts asaa asab asai asao asar asas asat asba asbo asia asii asio asir asis asit asob asoi asor asos asot asra asro asrs assa assi asso assr asss asst asta astb asti asto astr asts at-t ataa atab atai atar atas atat atbs atia atis atit atob atoi ator atos atot atra atri atro atsb atsi atst atta atti atto attr atts ba-i baaa baar baas baat baba babb babi babo babr babs baia baib baio bair bais bait baos bar- bara barb bari baro barr bars bart basa basi baso bass bast bata bati bato bats batt bbas bbbb bbbs biao biar bias biat biba bibb bibi bibo bibs biis bio- bioi bios biot bira birb biri biro birr birs birt bis- bisa biso biss bist bita bito bits bitt boab boai boar boas boat boba bobb bobi bobo bobs boi- boii bois boit boob boor boos boot bor- bora bori boro borr bors bort bosa bosi boso boss bost bota botb boti boto bots bott brab brai brao bras brat bria brio bris brit broa brob broo bror bros brot brrr brrs brsb brsr brst bsaa bsas bsat bsos bsra bsts btaa btob btor btrt btss bttb iaaa iaai iaas iaat iaba iaia iais iara iars iart iasa iasi iaso iasr iata iati ibar ibas ibat ibia ibis ibos ibot ibra ibri ibro ibsa ibss ibtb ibts iias iiii iiio iiis iiit iioi iioo iios iira iirs iisi iisr iist iita iitr iitt ioba iobi ioii ioio ioit iooi iooo ioos iora iori iors ioso iota ioto irai irao irar iras iri- iria irio iris irob irra irri irrs irsa irta irti irts is-a isai isao isar isas isat isba isbt isia isis isit iso- isor isos isra isri issa issi isso issr isss ista isti isto istr ists itaa itai itar itas itat itbs itia itis itoi itoo itor itos itra itri itrs itsa itsi itso itta itto oais oara oars oasi oass oast oats obai obas obba obbo obia obis obit oboi obor obos obot obra obri obro obsr obss obst obts oiba oiii oios oira oirt oist oita oiti ooaa ooba oobi ooia oooo ooos oora oort oosa oosi oost ootb oots orab orai orao orar oras orat orba orbb orbi orbo orbs ori- oria orio oris orit oro- oror oros orot orra orri orro orrs orsa orsi orso orta orto orts osai osar osas osat osba osia osii osis osoi osoo osor osos osro ossa ossb ossi osso osta osti ostr osts otar otas otbs otis otit oto- otoo otor otos otra otro otrs otsa otso otta otti otto otts raab raas raat raba rabb rabi rabo rabs raia raii rair rais rait raob raos rara rarb rari raro rars rasa rasi raso rass rast rata rati rato rats ratt rbbb rbbr rbbs rbis rbss rbst riaa riab riai rias riat rib- riba ribo ribs riia riis rios riot riri rirs risa risi riso riss rist rita riti rito rits ritt roab roar roas roat rob- roba robb robi robo robs robt roia roio roir rois roit roob rooi roor roos root rora rori roro rort rosa rosi roso ross rost rota roti roto rotr rots rott rras rrat rrrr rsaa rsai rsbi rsis rsos rssa rsts rtai rtas rtss rtts s-ib s-ii s-os saab saar saas saat saba sabb sabi sabo sabr sabs saia sair sais sait saoi saor saos sara sari saro sarr sars sart sasa sasi saso sass sast sata satb sati sato satr sats satt sbaa sbai sbar sbas sbbs sbia sbor sbot sbsa sbsi sbst siaa siab siai sias siat siba sibi sibo sibs siit sior sios siot sira siri siro sirr sirs sirt sisa sisi siss sist sit- sita siti sito sits sitt soar soas soat soba sobo sobr sobs sobt soia soir sois soit soor soos soot sora sorb sori soro sorr sors sort sosa sosi soso soss sost sota soto sots sras srib sris sros srta srtr ssaa ssab ssao ssas ssat ssbr ssis ssit ssot ssra ssri ssrs sssa sssb sssi ssss ssta sstb ssts stab stai star stas stat stbs stia stib stio stir stis stit stoa stob stoo stor stos stot stra stri stro strs stsi stss sttr taa- taar taas taat taba tabb tabi tabo tabs taia taio tair tais tait taoa taor taos tara tarb tari taro tarr tars tart tasa tasb tasi tasr tass tast tata tatb tati tato tatr tats tatt tbar tbas tbbs tbit tbrb tbst tbta tiaa tiab tiao tiar tias tiba tibi tibs tiit tios tira tirb tiri tiro tirr tirs tisa tisb tisi tiso tiss tist tita titi tito tits titt toab toas toat toba tobi tobo tobs tobt tois toit tooa toor toos toot tora tori toro torr tors tort tosa tosb tosi toso toss tost tota toti toto totr tots tott traa trab trai trao tras trat tri- tria trib trio tris trit troa troi troo tros trot trra trsi trst trtr tsaa tsai tsao tsar tsat tsia tsis tsob tsoi tsos tssa tssi tssr tsst tsts ttab ttbb ttss tttt