a-ha aaaa aaab aaaf aaah aaar aaba aabb aabh aabt aafa aafb aaff aaha aaoo aara aaro aart aata aatf aatt abaa abab abaf abar abat abb- abba abbb abbo abbr abbt abff abha abho abhr aboa abob abof aboh aboo abor abot abra abro abta afaa afao afar afat affa affo afft afoa afoo afor afr- afra afro afta ahab ahah ahar ahat ahfa ahha ahoa ahor ahot ahra ahrr ahta ahto aoah aoba aora aorb aort aotf arab araf arah arar arat arba arbh arfa arfb arff arft arh- aroa arob aroo aror arr- arra arrh arro arrr arrt arta arth arto artr at-t ataa atab atar atat atfb atha atho atob atof ator atot atra atro atta atto attr baaa baaf baah baar baat baba babb babo babr baff bafo baft baha baho bahr baht baoh bar- bara barb barf barh baro barr bart bata batf bath bato batt bbbb bfta bftt bhao bhar bhat bhff bhor bhot bhra bhrt boab boar boat boba bobb bobo bofa boff bofh boha boho bohr boht boob boof booh boor boot bor- bora borf borh boro borr bort bota botb both boto bott brab braf brah brao brat broa brob broh broo bror brot brrr btaa btaf btob btor btrt bttb faaa faah faba fabo fafa faff fafo faha fahr fara farb faro farr fart fata fatf fath fato fatt fbar ffar ffff ffrr fftf foaf foar foba fobt fofo fohr foof foot for- fora forb foro forr fort fota foth foto fott frab frat frob froh frot frta haab haaf haar haat haba habo habt hafb haff haft haha haho haht haor hara harf harh haro harr hart hata hatb hath hato hatt hbar hfba hhaa hhat hhhh hhof hoar hoat hoba hobo hoff hoha hoho hoof hoor hoot hora horo horr hort hota hotb hoth hoto hotr hott hrob hrta hrtb htab htoh htra httr oafo oara oath obba obbo obor obot obra obrh obro ofah off- offa offh offo offr ofor ofra ofta ohba ohho ohob ohoh ohra ohta ohto ooaa ooba ooff ooha ooho oooh oooo oora oort ootb orab orah orao orar orat orba orbb orbo orff oro- orof oror orot orra orro orta orth orto otar otha otho othr oto- otof otoh otoo otor otra otro otta otto raab raaf raat raba rabb rabo rafa raff raft raha rahr raht raob raoh rara rarb rarf raro rata ratf rath rato ratt rbaf rbbb rbbr rboh rhoa rhob rhoh roab roaf roar roat rob- roba robb robo robt roff rofo roha rohr roob roof roor root rora roro rort rota roth roto rotr rott rrah rrat rrrr rtbf rtfb taa- taaf taar taat taba tabb tabo tafa taff tafo taft taha taho tahr taoa taor tara tarb tarf taro tarr tart tata tatb tath tato tatr tatt tbaf tbar tbrb tbta tfot thaa thao thar that thof thoo thor thot thra thro thtb thtr toab toat toba tobo tobt tofa toff tofo toft toho tooa toof tooh toor toot tora torf toro torr tort tota toth toto totr tott traa trab traf trao trat trfr troa troo trot trra trtr ttab ttbb ttfa ttff tttt