aaaa aaab aaar aaas aaba aabb aabt aaoo aara aaro aars aart aasa aass aast aata aatt abaa abab abar abas abat abax abb- abba abbb abbo abbr abbs abbt aboa abob aboo abor abos abot abox abra abro abrs abs- absa abss abta abts aoba aora aorb aors aort aoss arab arar aras arat arax arba arbs aroa arob aroo aror aros arr- arra arro arrr arrs arrt ars- arsa arso arst arta arto artr arts artx 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 at-x ataa atab atar atas atat atax atbs atob ator atos atot atra atro atrx atsb atst atta atto attr atts axar axat axo- axoa axos axto axxo ba-x baaa baar baas baat baba babb babo babr babs baos bar- bara barb baro barr bars bart barx basa baso bass bast bata bato bats batt baxt bbas bbbb bbbs bbox boab boar boas boat boba bobb bobo bobs boob boor boos boot boox bor- bora boro borr bors bort bosa boso boss bost bota botb boto bots bott boxa brab brao bras brat brax broa brob broo bror bros brot brox 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 obox 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 oxa- oxo- oxos oxox oxxo raab raas raat raba rabb rabo rabs raob raos rara rarb raro rars rasa raso rass rast rata rato rats ratt raxa rbbb rbbr rbbs rbss rbst roab roar roas roat rob- roba robb robo robs robt roob roor roos root roox rora roro rort rosa roso ross rost rota roto rotr rots rott roxa roxo rras rrat rrrr rsaa rsos rssa rsts rtas rtss rtts s-os sa-x 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 saxa saxo saxt 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 soxs sras sros srta srtr ssaa ssab ssao ssas ssat ssbr ssot ssra ssrs sssa sssb ssss ssta sstb ssts stab star stas stat stax stbs stoa stob stoo stor stos stot stox 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 tax- taxa taxo taxt tbar tbas tbbs tbox tbrb tbst tbta toab toas toat toba tobo tobs tobt tooa toor toos toot tora toro torr tors tort torx tosa tosb toso toss tost tosx tota toto totr tots tott tox- toxa toxo toxs toxt traa trab trao tras trat trax troa troo tros trot trox trra trst trtr tsaa tsao tsar tsat tsob tsos tssa tssr tsst tsts ttab ttbb ttss tttt txaa txtr xaar xaos xara xats xbar xbox xbra xoro xors xosa xoxo xtar xtbs xtra xtro xtsr xxxo xxxx