a-a a-b a-t aaa aab aao aar aas aat ab- aba abb abo abr abs abt aoa aob aoo aor aos aot ar- ara arb aro arr ars art as- asa asb aso asr ass ast at- ata atb ato atr ats att baa bab bao bar bas bat bba bbb bbo bbr bbs bbt boa bob boo bor bos bot bra brb bro brr brs brt bsa bsb bso bsr bss bst bta btb bto btr bts btt oaa oab oao oar oas oat ob- oba obb obo obr obs obt oo- ooa oob ooo oor oos oot or- ora orb oro orr ors ort os- osa osb oso osr oss ost ot- ota otb oto otr ots ott ra- raa rab rao rar ras rat rba rbb rbo rbr rbs rbt roa rob roo ror ros rot rra rrb rrr rrs rrt rsa rsb rso rsr rss rst rta rtb rto rtr rts rtt saa sab sao sar sas sat sba sbb sbo sbr sbs sbt soa sob soo sor sos sot sr- sra srb sro srr srs srt ss- ssa ssb sso ssr sss sst sta stb sto str sts stt taa tab tao tar tas tat tba tbb tbo tbr tbs tbt to- toa tob too tor tos tot tra trb tro trr trs trt tsa tsb tso tsr tss tst tta ttb tto ttr tts ttt

aaaa aaab aaar aaas aaba aabb aabt aaoo aara aaro aars aart aasa aass aast aata aatt abaa abab abar abas abat abb- abba abbb abbo abbr abbs abbt aboa abob aboo abor abos abot abra abro abrs abs- absa abss abta abts aoba aora aorb aors aort aoss arab arar aras arat arba arbs aroa arob aroo aror aros arr- arra arro arrr arrs arrt ars- arsa arso arst arta arto artr arts asaa asab asao asar asas asat asba asbo asob asor asos asot asra asro asrs assa asso assr asss asst asta astb asto astr asts at-t ataa atab atar atas atat atbs atob ator atos atot atra atro atsb atst atta atto attr atts baaa baar baas baat baba babb babo babr babs baos bar- bara barb baro barr bars bart basa baso bass bast bata bato bats batt bbas bbbb bbbs boab boar boas boat boba bobb bobo bobs boob boor boos boot bor- bora boro borr bors bort bosa boso boss bost bota botb boto bots bott brab brao bras brat broa brob broo bror bros brot brrr brrs brsb brsr brst bsaa bsas bsat bsos bsra bsts btaa btob btor btrt btss bttb oara oars oass oast oats obas obba obbo obor obos obot obra obro obsr obss obst obts ooaa ooba oooo ooos oora oort oosa oost ootb oots orab orao orar oras orat orba orbb orbo orbs oro- oror oros orot orra orro orrs orsa orso orta orto orts osar osas osat osba osoo osor osos osro ossa ossb osso osta ostr osts otar otas otbs oto- otoo otor otos otra otro otrs otsa otso otta otto otts raab raas raat raba rabb rabo rabs raob raos rara rarb raro rars rasa raso rass rast rata rato rats ratt rbbb rbbr rbbs rbss rbst roab roar roas roat rob- roba robb robo robs robt roob roor roos root rora roro rort rosa roso ross rost rota roto rotr rots rott rras rrat rrrr rsaa rsos rssa rsts rtas rtss rtts s-os saab saar saas saat saba sabb sabo sabr sabs saor saos sara saro sarr sars sart sasa saso sass sast sata satb sato satr sats satt sbaa sbar sbas sbbs sbor sbot sbsa sbst soar soas soat soba sobo sobr sobs sobt soor soos soot sora sorb soro sorr sors sort sosa soso soss sost sota soto sots sras sros srta srtr ssaa ssab ssao ssas ssat ssbr ssot ssra ssrs sssa sssb ssss ssta sstb ssts stab star stas stat stbs stoa stob stoo stor stos stot stra stro strs stss sttr taa- taar taas taat taba tabb tabo tabs taoa taor taos tara tarb taro tarr tars tart tasa tasb tasr tass tast tata tatb tato tatr tats tatt tbar tbas tbbs tbrb tbst tbta toab toas toat toba tobo tobs tobt tooa toor toos toot tora toro torr tors tort tosa tosb toso toss tost tota toto totr tots tott traa trab trao tras trat troa troo tros trot trra trst trtr tsaa tsao tsar tsat tsob tsos tssa tssr tsst tsts ttab ttbb ttss tttt

-aaa- aaaas aaasa aaass aaata aabaa aabba aabra aarts aasra aatsr abaab ababa ababs abara abasa abass abbar abbas abbat abbos abbot abbrs aboab aboat abobo aboot abora abort aboso abott abrar abras absar abstr abtaa abtao abtar aoos aort- aorta aosta ar-ab araat arab- araba arabo arabs arara arars arass arata arbab arbar arbas arbat arbor arbos arbot aroab aroar aroba aroor aroos aroot arora arosa arras arros arsat arsos artar artas artat arto- artoo artos artot asaba asara asaro asasa asats asbos asbro asoar asors asort asosa asota asrar asror assab assas assat assoa assos assot assts astab astar astas astat astoo astor astos astr- astra astro atara atars atats atbar atbat atoot atora ators atoss atoto atrab atras atro- atroa atrot atrst attar attas atto- attra baars baart baata babar babas babbs baboo babos babot babra baoro baraa barab barao barar baras barat barba barbs baro- baroa baroo baror baros barot barra barro barrs barsa barss barst barta barto barts basab basar baso- basor basra bassa basso basta basto basts batab batar batas batat batob batoo bator batos batra batsa batta batto batts bbart bo-bo boaro boars boart boast boats bobar bobos bobr bobst bobts booat booba boobs boora boors boort boosa boost boota boots boras borat borba borbo boro- boroa boroo boros borot borra borro borsa borst borts bosas bosor bosra bossa bosso bosta botar botas botos botro botta botts braas braat brasa brass brast brats bratt brobo brobs broos brora bross broto brrar brrrr bsaba