a-a a-b a-t aaa aab aao aar aas aat aax ab- aba abb abo abr abs abt abx aoa aob aoo aor aos aot aox ar- ara arb aro arr ars art arx as- asa asb aso asr ass ast asx at- ata atb ato atr ats att atx ax- axa axo axr axs axt axx baa bab bao bar bas bat bax bba bbb bbo bbr bbs bbt bbx boa bob boo bor bos bot box bra brb bro brr brs brt brx bsa bsb bso bsr bss bst bsx bta btb bto btr bts btt btx bxb bxo bxx oaa oab oao oar oas oat oax ob- oba obb obo obr obs obt obx oo- ooa oob ooo oor oos oot oox or- ora orb oro orr ors ort orx os- osa osb oso osr oss ost osx ot- ota otb oto otr ots ott ox- oxa oxb oxo oxt oxx ra- raa rab rao rar ras rat rax rba rbb rbo rbr rbs rbt rbx roa rob roo ror ros rot rox rra rrb rrr rrs rrt rsa rsb rso rsr rss rst rsx rta rtb rto rtr rts rtt rtx rxr rxs saa sab sao sar sas sat sax sba sbb sbo sbr sbs sbt sbx soa sob soo sor sos sot sox sr- sra srb sro srr srs srt srx ss- ssa ssb sso ssr sss sst ssx sta stb sto str sts stt stx sxs sxt t-x taa tab tao tar tas tat tax tba tbb tbo tbr tbs tbt to- toa tob too tor tos tot tox tra trb tro trr trs trt trx tsa tsb tso tsr tss tst tsx tta ttb tto ttr tts ttt ttx txs txt xaa xar xas xat xbr xbx xoa xoo xor xos xot xox xrt xrx xsa xsb xss xst xtr xts xtx xxo xxx

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

-aaa- a-box 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 araxa arbab arbar arbas arbat arbor arbos arbot aroab aroar aroba aroor aroos aroot arora arosa arras arros arsat arsos art-x artar artas artat artax arto- artoo artos artot asaba asara asaro asasa asats asbos asbro asoar asors asort asosa asota asrar asror assab assas