a-be a-ii aaaa aaab aaae aaai aaar aaba aabb aabi aabt aaea aaib aaii aara aare aari aart aata aatt abaa abab abae abai abar abat abb- abba abbb abbe abbi abbr abbt abee aber abet abia abib abie abir abit abra abri abta aebi aeer aeit aer- aera aeri aeta aetr aett aiai aiba aiea aiee aiet aiia aiib aiir aira aire airi airt aita aite aiti aitr aitt arab arae arai arar arat arba arbe arbi area aree arei aret aria arib arie arii arit arr- arra arre arri arrr arrt arta arte arti artr at-t ataa atab atae atai atar atat atea atee atei ater atia atie atit atra atre atri atta atte atti attr ba-i baaa baar baat baba babb babe babi babr baer baia baib baie bair bait bar- bara barb bare bari barr bart bata bate bati batt bbbb bbeb bbet bear beat beba bebb bebe bebi beeb beer beet beia beir beit bera bere beri berr bert beta bete beti bett biar biat biba bibb bibe bibi bieb bier biet bira birb bire biri birr birt bita bite bitt brab brae brai brat brea breb bree brei brer bret bria brie brit brrr btaa btie btrt bttb eaba eara earb eare eart eata eate eati ebba ebbr eber ebit eeea eeee eera eeta eete eiei eier eira eire eita eitb eiti eitr erat erba erbb erbe ereb erei erer eret eria erie erit erra erre erta etai etat etbr etee eter etra etre etta ette etti i-be iaaa iaai iaat iaba iaea iaia iara iare iart iata iate iati ibar ibat ibea ibet ibia ibie ibra ibri ibtb ieat ieet ieie iera iere ieri ieta iett iiie iiii iiit iira iita iitr iitt irae irai irar irbe iree irer iri- iria irie irra irre irri irta irte irti itaa itai itar itat itbe itea iter itet itia itie itra itri itta raab raat raba rabb rabe rabi raer raia raie raii rair rait rara rarb rare rari rata rate rati ratt rbbb rbbr rea- reae rear reat reba rebb rebe reeb reet reia reii reir reit rera rere reri rert reta rete reti retr rett riaa riab riai riat rib- riba ribe rier riet riia rire riri rita rite riti ritt rrat rrrr rtai rtee rtei taa- taar taat taba tabb tabe tabi taer taia tair tait tara tarb tare tari tarr tart tata tatb tate tati tatr tatt tbar tbit tbrb tbta tear teat teba teer teet teia teie teir ter- tera tere teri terr teta tete teti tetr tett tiaa tiab tiar tiba tibi tie- tiea tiee tiei tier tiet tiit tira tirb tire tiri tirr tita tite titi titt traa trab trae trai trat tre- trea tree trei tret tri- tria trib trie trit trra trte trtr ttab ttbb tter tttt