a-be a-ii aaaa aaab aaae aaaf aaai aaar aaba aabb aabi aabt aaea aafa aafb aaff aafi aaib aaii aara aare aari aart aata aatf aatt abaa abab abae abaf abai abar abat abb- abba abbb abbe abbi abbr abbt abee aber abet abff abia abib abie abir abit abra abri abta aeaf aebi aeer aeit aer- aera aeri aeta aetf aetr aett afaa afar afat afee afer afet affa affi afft afia afib afif afir afit afr- afra afre afri afta afte aiai aiba aiea aiee aiet aiff aiia aiib aiir aira aire airi airt aita aite aitf aiti aitr aitt arab arae araf arai arar arat arba arbe arbi area aree aref arei aret arfa arfb arff arft aria arib arie arif arii arit arr- arra arre arri arrr arrt arta arte arti artr at-t ataa atab atae atai atar atat atea atee atef atei ater atfb atfe atia atie atif atit atra atre atri atta atte atti attr ba-i baaa baaf baar baat baba babb babe babi babr baer baff baft baia baib baie bair bait bar- bara barb bare barf bari barr bart bata bate batf bati batt bbbb bbeb bbet beaf bear beat beba bebb bebe bebi beeb beef beer beet befa befe beff beft beia beir beit bera bere beri berr bert beta bete beti bett bfta bftt biaf biar biat biba bibb bibe bibi bieb bief bier biet bifa biff bifi bira birb bire biri birr birt bita bite bitt brab brae braf brai brat brea breb bree bref brei brer bret bria brie brit brrr btaa btaf btie btrt bttb eaaf eaba eafb eaif eara earb eare eart eata eate eati ebba ebbr eber ebit eeea eeee eefa eefe eera eeta eete efab efbr efet effa effi efit eft- efta eiei eier eira eire eita eitb eiti eitr eraf erat erba erbb erbe ereb erei erer eret erft eria erie erit erra erre erta etai etat etbr etee eter etfa etfb etfe etra etre etta ette etti faaa faba fabe fabi faeb fafa fafe faff fafi faie fair fait fara farb fare farr fart fata fate fatf fati fatt fbar feaf fear feat feba feeb feer feet fefe feff fefi feia feie feir feit fera ferb fere ferr fert feta fete feti fetr fett ffar ffee ffff ffii ffrr fftf fiaa fiaf fiar fiat fiba fibe fief fier fifa fife fiff fifi fift fiii fira fire fita fite fiti fitt frab frae frat frea free frei fret fria frib frie frit frta ftea fter ftii i-be iaaa iaai iaat iaba iaea iafe iaff iaia iara iare iart iata iate iati ibar ibat ibea ibet ibfi ibia ibie ibra ibri ibtb ieat ieet ieie iera iere ieri ieta ietf iett ifaa ifae ifar ifat ifbb ifer ifit ifra ifrb ifrf ifri ifta iifa iiie iiii iiit iira iita iitr iitt irae iraf irai irar irbe iree irer irfe iri- iria irie irra irre irri irta irte irtf irti itaa itaf itai itar itat itbe itea iter itet itfa itia itie itif itra itrf itri itta ittf raab raaf raat raba rabb rabe rabi raef raer rafa rafe raff rafi raft raia raie raif raii rair rait rara rarb rare rarf rari rata rate ratf rati ratt rbaf rbbb rbbr rea- reae reaf rear reat reba rebb rebe reeb reef reet refe reff refi refr reft reia reif reii reir reit rera rere reri rert reta rete reti retr rett rfae rfef riaa riab riai riat rib- riba ribe rief rier riet rifa rife riff rift riia riif rire riri rita rite riti ritt rrat rrif rrrr rtai rtbf rtee rtei rtfb taa- taaf taar taat taba tabb tabe tabi taer tafa tafe taff tafi taft taia tair tait tara tarb tare tarf tari tarr tart tata tatb tate tati tatr tatt tbaf tbar tbit tbrb tbta tear teat teba teef teer teet teff tefi teft teia teie teir ter- tera tere terf teri terr teta tete teti tetr tett tfae tfeb tiaa tiab tiaf tiar tiba tibi tie- tiea tiee tief tiei tier tiet tifa tiff tift tiit tira tirb tire tiri tirr tita tite titi titt traa trab trae traf trai trat tre- trea tree tref trei tret trfr tri- tria trib trie trif trit trra trte trtr ttab ttbb tter ttfa ttff tttt