a-ii aaaa aaab aaai aaar aaba aabb aabi aabt aaib aaii aaoo aara aari aaro aart aata aatt abaa abab abai abar abat abb- abba abbb abbi abbo abbr abbt abia abib abir abit aboa abob aboo abor abot abra abri abro abta aiai aiba aibo aiia aiib aiir aioi aira airi airo airt aita aiti aitr aitt 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 at-t ataa atab atai atar atat atia atit atob atoi ator atot atra atri atro atta atti atto attr 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 bbbb biao biar biat biba bibb bibi bibo bio- bioi biot bira birb biri biro birr birt bita bito bitt 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 brab brai brao brat bria brio brit broa brob broo bror brot brrr btaa btob btor btrt bttb iaaa iaai iaat iaba iaia iara iart iata iati 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 irra irri irta irti itaa itai itar itat itia itoi itoo itor itra itri itta itto oara obai obba obbo obia obit oboi obor obot obra obri obro oiba oiii oira oirt oita oiti ooaa ooba oobi ooia oooo oora oort ootb orab orai orao orar orat orba orbb orbi orbo ori- oria orio orit oro- oror orot orra orri orro orta orto otar otit oto- otoo otor otra otro otta otti otto raab raat raba rabb rabi rabo raia raii rair rait raob rara rarb rari raro rata rati rato ratt rbbb rbbr riaa riab riai riat rib- riba ribo riia riot riri rita riti rito ritt 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 rrat rrrr rtai 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 tbar tbit tbrb tbta tiaa tiab tiao tiar tiba tibi tiit tira tirb tiri tiro tirr tita titi tito titt toab toat toba tobi tobo tobt toit tooa toor toot tora tori toro torr tort tota toti toto totr tott traa trab trai trao trat tri- tria trib trio trit troa troi troo trot trra trtr ttab ttbb tttt