a-ii a-iv aaaa aaab aaai aaar aaav aaba aabb aabi aabt aaib aaii aaoo aara aari aaro aart aata aatt aava abaa abab abai abar abat abb- abba abbb abbi abbo abbr abbt abia abib abir abit aboa abob aboo abor abot abov abra abri abro abta abva aiai aiba aibo aiia aiib aiir aioi aira airi airo airt aita aiti aitr aitt aiva aoba aora aorb aort arab arai arar arat arba arbi aria arib arii ario arit aroa arob aroi aroo aror arr- arra arri arro arrr arrt arta arti arto artr artv arva arvi arvo at-t ataa atab atai atar atat atia atit atob atoi ator atot atra atri atro atta atti atto attr atvi avab avao avar avat avia avio avit aviv avor avot avra avri avro avva avvo ba-i baaa baar baat baba babb babi babo babr baia baib baio bair bait bar- bara barb bari baro barr bart bata bati bato batt bava bavi bbbb biao biar biat biba bibb bibi bibo bio- bioi biot bira birb biri biro birr birt bita bito bitt bivi boab boai boar boat boba bobb bobi bobo boi- boii boit boob boor boot bor- bora bori boro borr bort bota botb boti boto bott bova bovi bovo brab brai brao brat brav bria brio brit broa brob broo bror brot brrr brvi btaa btob btor btrt bttb btvi iaaa iaai iaat iaba iaia iara iart iata iati iava ibar ibat ibia ibot ibra ibri ibro ibtb iiii iiio iiit iioi iioo iira iita iitr iitt ioba iobi ioii ioio ioit iooi iooo iora iori iota ioto irai irao irar iri- iria irio irob irov irra irri irta irti itaa itai itar itat itia itoi itoo itor itra itri itta itto ivai ivao ivar ivbv ivor oara obai obba obbo obia obit oboi obor obot obra obri obro obvi oiav oiba oiii oira oirt oita oiti ooaa ooba oobi ooia oooo oora oort ootb orab orai orao orar orat orav orba orbb orbi orbo ori- oria orio orit oro- oror orot orra orri orro orta orto orvr otar otit oto- otoo otor otov otra otro otta otti otto ovar ovi- ovo- ovoo ovot ovra raab raat raba rabb rabi rabo raia raii rair rait raob rara rarb rari raro rata rati rato ratt rava ravi rbbb rbbr riaa riab riai riat rib- riba ribo riia riot riri rita riti rito ritt riva rivo roab roar roat rob- roba robb robi robo robt roia roio roir roit roob rooi roor root rora rori roro rort rota roti roto rotr rott rova rovi rovo rrat rrrr rtai rtva rtvi taa- taar taat taba tabb tabi tabo taia taio tair tait taoa taor tara tarb tari taro tarr tart tata tatb tati tato tatr tatt tatv tava tavi tavo tbar tbit tbrb tbta tbvi tiaa tiab tiao tiar tiba tibi tiit tira tirb tiri tiro tirr tita titi tito titt tiva tivi tivo toab toat toba tobi tobo tobt toit tooa toor toot tora tori toro torr tort torv tota toti toto totr tott tova tovo traa trab trai trao trat trav tri- tria trib trio trit troa troi troo trot trra trtr ttab ttbb tttt tvri tvro tvrr tvtv vaar vaat vaia vaio vair vait vara vari varr vart vata vati vato vatt vava viar viii vira virb viri viro virr virt vita viti vito vitt viva vivi vivo voar voat voia voio voir voit voor voot vor- vora vori voro vort vota voto vrai vrav vrba vria vrio vrot vrto vt-i vvob vvvv