a-a a-c a-t aaa aac aao aar aas aat aax ac- aca acc aco acr acs act acx aoa aoc aoo aor aos aot aox ar- ara arc aro arr ars art arx as- asa asc aso asr ass ast asx at- ata atc ato atr ats att atx ax- axa axo axr axs axt axx c-- caa cac cao car cas cat cax cca ccc cco ccr ccs cct ccx co- coa coc coo cor cos cot cox cra crc cro crr crs crt crx csa csc cso csr css cst csx cta ctc cto ctr cts ctt ctx cxc cxo cxr cxs cxt cxx oaa oac oao oar oas oat oax oc- oca occ oco ocr ocs oct ocx oo- ooa ooc ooo oor oos oot oox or- ora orc oro orr ors ort orx os- osa osc oso osr oss ost osx ot- ota otc oto otr ots ott ox- oxa oxc oxo oxt oxx ra- raa rac rao rar ras rat rax rca rcc rco rcr rcs rct rcx roa roc roo ror ros rot rox rra rrc rrr rrs rrt rsa rsc rso rsr rss rst rsx rta rtc rto rtr rts rtt rtx rxr rxs saa sac sao sar sas sat sax sca scc sco scr scs sct scx soa soc soo sor sos sot sox sr- sra src sro srr srs srt srx ss- ssa ssc sso ssr sss sst ssx sta stc sto str sts stt stx sxc sxs sxt t-x taa tac tao tar tas tat tax tca tcc tco tcr tcs tct tcx to- toa toc too tor tos tot tox tra trc tro trr trs trt trx tsa tsc tso tsr tss tst tsx tta ttc tto ttr tts ttt ttx txs txt xaa xac xar xas xat xcr xcx xoa xoc xoo xor xos xot xox xrc xrt xrx xsa xsc xss xst xtc xtr xts xtx xxo xxx

aaaa aaac aaar aaas aaca aacc aaco aacr aacs aact aaoo aara aarc aaro aars aart aasa aasc aass aast aata aatc aatt ac-t acaa acac acar acas acat acca accc acco accs acct acoa acor acos acot acr- acra acrc acro acrr acrs acsa acsc acss acst acta actc acto acts actt aoca aocs aora aors aort aoss aotc arac arar aras arat arax arc- arca arco arcs arct aroa aroo aror aros arr- arra arrc arro arrr arrs arrt ars- arsa arsc arso arst arta artc arto artr arts artx asaa asac asao asar asas asat asc- asca ascc asco ascr asct ascx asoc asor asos asot asra asrc asro asrs assa assc asso assr asss asst asta astc asto astr asts at-t at-x ataa atac atar atas atat atax atca atcc atco atcr atcs atoc ator atos atot atra atrc atro atrx atsc atst atta atto attr atts axar axat axo- axoa axos axto axxo caaa caac caas caat cac- caca cacc caco cacr caor caos cara carc caro carr cars cart carx casa casc caso casr cass cast cat- cata catc cato cats catt caxa ccaa ccac ccar ccas ccat ccca cccc cccs ccoc ccra ccrc ccrs ccrt ccsa ccss ccst cctc cctt coas coat coax coca coco coct coos coot cor- cora corc coro corr cors cort cosa cosc coso coss cost cota cotc coto cots cott coxa crac crar cras crat crax crca crcc crcr croc croo cror crot crrt crsa crss crst crtc crts csaa csac csao csar csas csat cscc csco cscr cscs csor csos csot csox csra csrc csrs cssa cssr csta cstc csto cstr csts cstx csxt ctca ctor ctos ctot ctrc ctrs ctsa ctsc ctss ctta ctts cxro cxxx oara oars oasc oass oast oats ocac ocas ocat occa occc occt ocos ocra ocro ocrr ocrs ocsa oct- octa octo octs ooaa oocr oooo ooos oora oort oosa oost oots orac orao orar oras orat orca orco orcs oro- oror oros orot orra orro orrs orsa orso orta ortc orto orts osar osas osat osca oscc osco osoo osor osos osro ossa osso osta ostc ostr osts otac otar otas oto- otoo otor otos otra otro otrs otsa otso otta otto otts oxa- oxo- oxos oxox oxxo raas raat rac- raca racc raco racs ract raoc raos rara raro rars rasa rasc raso rass rast rata rato rats ratt raxa rcac rcas rccc rccs rcos rcsa rcsc rcss rctc rcts roar roas roat roca rocc roco rocs roor roos root roox rora rorc roro rort rosa rosc roso ross rost rota rotc roto rotr rots rott roxa roxo rras rrat rrrr rsaa rscc rscs rsos rssa rsts rtas rtca rtcc rtss rtts s-os sa-c sa-x saac saar saas saat saca sacc saco sacr sacs sact saor saos sara sarc saro sarr sars sart sasa sasc saso sass sast sata satc sato satr sats satt saxa saxo saxt scaa scac scar scas scat sccc sccs scct scoo scor scot scox scr- scra scrc scrs scsa scsc scso scsr scst sctc scto sctr scts soar soas soat soca soco socr socs socx soor soos soot sora soro sorr sors sort sosa soso soss sost sota sotc soto sots soxs sras srcc srct sros srta srtr ssaa ssac ssao ssas ssat ssca sscc sscs ssoc ssot ssra ssrc ssrs sssa sssc ssss ssta sstc ssts stac star stas stat stax stca stcc stcs stoa stoo stor stos stot stox stra strc stro strs stss sttc sttr taa- taar taas taat taca tacc taco tacs tact taoa taor taos tara tarc taro tarr tars tart tasa tasc tasr tass tast tata tato tatr tats tatt tax- taxa taxo taxt tcca tccc tcos tctc tcts toas toat toca toco tooa toor toos toot tora torc toro torr tors tort torx tosa tosc toso toss tost tosx tota totc toto totr tots tott tox- toxa toxo toxs toxt traa trac trao tras trat trax trca trcc troa troc troo tros trot trox trra trst trtc trtr tsaa tsao tsar tsat tsca tscc tsos tssa