aaaa aaab aaal aaar aaba aabb aabl aabt aala aall aalo aaoo aara aaro aart aata aatt abaa abab abal abar abat abb- abba abbb abbo abbr abbt abla ablo aboa abob abol aboo abor abot abra abro abta alaa alal alao alar alat alb- alba albo all- alla alll allo allr aloa alol aloo alor alot alro alta alto aoba aola aora aorb aort arab aral arar arat arba arla arlo aroa arob aroo aror arr- arra arro arrr arrt arta arto artr at-l at-t ataa atab atal atar atat atla atlo atob atol ator atot atra atro atta atto attr baaa baal baar baat baba babb babo babr bala ball balo balt baol bar- bara barb baro barr bart bata bato batt bbbb bblb blaa blab blat blbt blob bloo blot boab boal boar boat boba bobb bobo bola boll bolo bolt boob bool boor boot bor- bora boro borr bort bota botb boto bott brab brao brat broa brob brol broo bror brot brrr btaa btla btob btor btrt bttb laaa laal laar laat laba labo labr lala lall lalo lara larb larr lart lata lato latt lbar lblr lbrt llao llat llll lloa lloo loar loat lob- loba lobb lobo lola loll lolo loob lool loor loot lora loro lota lotl loto lotr lott lral lrat lrba lrrr lrta ltbl ltra lttr oall oara obal obba obbo obla obol obor obot obra obro olar olat olba olbo olla ollo olor olot olta ooaa ooba oola oolo oooo oora oort ootb orab oral orao orar orat orba orbb orbo orla orlo oro- oror orot orra orro orta orto otar oto- otoo otor otra otro otta otto raab raat raba rabb rabl rabo rala ralb rall ralo ralt raob raol rara rarb raro rata rato ratt rbbb rbbr rlab roab roar roat rob- roba robb robo robt rola roll rolo rolt roob rool roor root rora roro rort rota rotl roto rotr rott rrat rrrr rtlt taa- taal taar taat taba tabb tabl tabo tala tall talo taoa taor tara tarb taro tarr tart tata tatb tato tatr tatt tbar tbrb tbta toab toal toat toba tobo tobt tol- tola toll tolo tolt tooa tool toor toot tora toro torr tort tota toto totr tott traa trab tral trao trat troa troo trot trra trtr ttab ttbb tttt