a-do aaaa aaab aaad aaar aaba aabb aabd aabt aada aadt aaoo aara aard aaro aart aata aatt abaa abab abad abar abat abb- abba abbb abbo abbr abbt abda abdo aboa abob abod aboo abor abot abra abro abta adaa adab adad adao adar adat adba adda addd addo addr adob adod adoo ador adot adra adro adta aoba aora aorb aort aotd arab arad arar arat arba arda ardo aroa arob arod aroo aror arr- arra arro arrr arrt arta arto artr at-t ataa atab atad atar atat atdt atob atod ator atot atra atro atta atto attr baaa baad baar baat baba babb babo babr bada badb badd bado badr bar- bara barb bard baro barr bart bata bato batt bbad bbbb bbdd bbdo bd-r boab boad boar boat boba bobb bobo boda bodb bodo boob bood boor boot bor- bora bord boro borr bort bota botb botd boto bott brab brad brao brat brda brdo brdt broa brob brod broo bror brot brrr btaa btdt btob btor btrt bttb d-bo daab daad daar daba dabb dabo dabt dada dado dara darb dard daro darr dart data dato datr datt dbar dbtt dddd ddot doab doar doat doba dobb dod- doda dodd dodo doob dood door doot dora dord doro dorr dort dota dotd doto dott draa drab drad drar drat drba drda drob drod drot drra dtaa dtor dtot oara obad obba obbo obdt obor obot obra obro obtd odbo odda oddd odoo odor odot odra ooaa ooba ooda oooo oora oord oort ootb orab orad orao orar orat orba orbb orbo orda ordo oro- oror orot orra orro orta orto otar otbd oto- otoo otor otra otro otta otto raab raad raat raba rabb rabo rada radd rado radr radt raob rara rarb raro rata rato ratt rbbb rbbr roab road roar roat rob- roba robb robo robt roda rodd rodo roob rood roor root rora roro rort rota roto rotr rott rrad rrat rrrr rtdt taa- taar taat taba tabb tabo tada tado taoa taor tara tarb tard taro tarr tart tata tatb tato tatr tatt tbar tbrb tbta tddb tdor tdra toab toad toat toba tobo tobt toda todd todo todt tooa tood toor toot tora tord toro torr tort tota totd toto totr tott traa trab trad trao trat troa trod troo trot trra trtr ttab ttbb tttt