aaaa aaab aaar aaba aabb aabt aaoo aara aaro aart aata aatt abaa abab abaj abar abat abb- abba abbb abbo abbr abbt aboa abob aboo abor abot abra abro abta ajab ajao ajar ajat ajba ajob ajoo ajot aoba aora aorb aort arab arar arat arba arja arjo aroa arob aroo aror arr- arra arro arrr arrt arta arto artr at-t ataa atab atar atat atob ator atot atra atro atta atto attr baaa baar baat baba babb babo babr baja bar- bara barb baro barr bart bata bato batt bbbb bjoa boab boar boat boba bobb bobo bojo bojt boob boor boot bor- bora borj boro borr bort bota botb boto bott brab braj brao brat broa brob broo bror brot brrr btaa btob btor btrt bttb j-ro jaar jaba jabo jabr jaja jara jaro jarr jart jato jbaa jbar jbob jjar joab joao joar joba jobo jojo joor joot jora joro jort jota joto jott jrbr jtar oara obba obbo obja obor obot obra obro ooaa ooba oooo oora oort ootb orab orao orar orat orba orbb orbo oro- oror orot orra orro orta orto otar oto- otoo otor otra otro otta otto raab raaj raat raba rabb rabo raja rajo raob rara rarb raro rata rato ratt rbbb rbbr roab roar roat rob- roba robb robo robt roja rojo roob roor root rora roro rort rota rotj roto rotr rott rrat rrrr taa- taar taat taba tabb tabo tajo taoa taor tara tarb taro tarr tart tata tatb tato tatr tatt tbar tbrb tbta toab toat toba tobo tobt toja tojo tooa toor toot tora toro torr tort tota toto totr tott traa trab trao trat troa troo trot trra trtr ttab ttbb tttt