a-ha aaaa aaab aaah aaar aaba aabb aabh aabt aaha aaoo aara aaro aart aata aatt abaa abab abar abat abb- abba abbb abbo abbr abbt abha abho abhr aboa abob aboh aboo abor abot abra abro abta ahab ahah ahar ahat ahha ahoa ahor ahot ahra ahrr ahta ahto aoah aoba aora aorb aort arab arah arar arat arba arbh arh- aroa arob aroo aror arr- arra arrh arro arrr arrt arta arth arto artr at-t ataa atab atar atat atha atho atob ator atot atra atro atta atto attr baaa baah baar baat baba babb babo babr baha baho bahr baht baoh bar- bara barb barh baro barr bart bata bath bato batt bbbb bhao bhar bhat bhor bhot bhra bhrt boab boar boat boba bobb bobo boha boho bohr boht boob booh boor boot bor- bora borh boro borr bort bota botb both boto bott brab brah brao brat broa brob broh broo bror brot brrr btaa btob btor btrt bttb haab haar haat haba habo habt haha haho haht haor hara harh haro harr hart hata hatb hath hato hatt hbar hhaa hhat hhhh hoar hoat hoba hobo hoha hoho hoor hoot hora horo horr hort hota hotb hoth hoto hotr hott hrob hrta hrtb htab htoh htra httr oara oath obba obbo obor obot obra obrh obro ohba ohho ohob ohoh ohra ohta ohto ooaa ooba ooha ooho oooh oooo oora oort ootb orab orah orao orar orat orba orbb orbo oro- oror orot orra orro orta orth orto otar otha otho othr oto- otoh otoo otor otra otro otta otto raab raat raba rabb rabo raha rahr raht raob raoh rara rarb raro rata rath rato ratt rbbb rbbr rboh rhoa rhob rhoh roab roar roat rob- roba robb robo robt roha rohr roob roor root rora roro rort rota roth roto rotr rott rrah rrat rrrr taa- taar taat taba tabb tabo taha taho tahr taoa taor tara tarb taro tarr tart tata tatb tath tato tatr tatt tbar tbrb tbta thaa thao thar that thoo thor thot thra thro thtb thtr toab toat toba tobo tobt toho tooa tooh toor toot tora toro torr tort tota toth toto totr tott traa trab trao trat troa troo trot trra trtr ttab ttbb tttt