a-a a-c a-t aaa aac aaf aao aar aas aat aax ac- aca acc acf aco acr acs act acx af- afa afc aff afo afr afs aft afx aoa aoc aof aoo aor aos aot aox ar- ara arc arf aro arr ars art arx as- asa asc asf aso asr ass ast asx at- ata atc atf ato atr ats att atx ax- axa axo axr axs axt axx c-- caa cac caf cao car cas cat cax cca ccc ccf cco ccr ccs cct ccx cfa cfc cff cfo cfr cfs cft cfx co- coa coc cof coo cor cos cot cox cra crc crf cro crr crs crt crx csa csc csf cso csr css cst csx cta ctc ctf cto ctr cts ctt ctx cxc cxf cxo cxr cxs cxt cxx faa fac faf fao far fas fat fax fca fcc fcf fco fcr fcs fct fcx ffa ffc fff ffo ffr ffs fft ffx foa foc fof foo for fos fot fox fra frc frf fro frr frs frt fsa fsc fsf fso fsr fss fst fsx fta ftc ftf fto ftr fts ftt ftx fxr fxs fxt fxx oaa oac oaf oao oar oas oat oax oc- oca occ ocf oco ocr ocs oct ocx of- ofa ofc off ofo ofr ofs oft ofx oo- ooa ooc oof ooo oor oos oot oox or- ora orc orf oro orr ors ort orx os- osa osc osf oso osr oss ost osx ot- ota otc otf oto otr ots ott ox- oxa oxc oxf oxo oxt oxx ra- raa rac raf rao rar ras rat rax rca rcc rcf rco rcr rcs rct rcx rfa rfc rff rfo rfr rfs rft roa roc rof roo ror ros rot rox rra rrc rrf rrr rrs rrt rsa rsc rsf rso rsr rss rst rsx rta rtc rtf rto rtr rts rtt rtx rxr rxs saa sac saf sao sar sas sat sax sca scc scf sco scr scs sct scx sfa sfc sff sfo sfr sfs sft sfx soa soc sof soo sor sos sot sox sr- sra src srf sro srr srs srt srx ss- ssa ssc ssf sso ssr sss sst ssx sta stc stf sto str sts stt stx sxc sxs sxt t-x taa tac taf tao tar tas tat tax tca tcc tcf tco tcr tcs tct tcx tfa tfc tff tfo tfr tfs tft tfx to- toa toc tof too tor tos tot tox tra trc trf tro trr trs trt trx tsa tsc tsf tso tsr tss tst tsx tta ttc ttf tto ttr tts ttt ttx txf txs txt xaa xac xaf xar xas xat xcf xcr xcx xfa xfs xft xfx xoa xoc xof xoo xor xos xot xox xrc xrf xrt xrx xsa xsc xss xst xtc xtf xtr xts xtx xxo xxx

aaaa aaac aaaf aaar aaas aaca aacc aacf aaco aacr aacs aact aafa aafc aaff aaoo aara aarc aaro aars aart aasa aasc aasf aass aast aata aatc aatf aatt ac-t acaa acac acar acas acat acca accc accf acco accs acct acfc acfs acft acoa acor acos acot acr- acra acrc acro acrr acrs acsa acsc acss acst acta actc actf acto acts actt afaa afao afar afat afca afcc afcs affa affc affo affs afft afoa afoo afor afox afr- afra afrc afro afrs afsa afsc afst afta aftc afts aoca aocs aora aors aort aoss aotc aotf arac araf arar aras arat arax arc- arca arco arcs arct arfa arfc arff arfs arft aroa aroo aror aros arr- arra arrc arro arrr arrs arrt ars- arsa arsc arso arst arta artc arto artr arts artx asaa asac asaf asao asar asas asat asc- asca ascc asco ascr asct ascx asfa asoc asof 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 atcf atco atcr atcs atfc atfs atoc atof ator atos atot atra atrc atro atrx atsc atst atta atto attr atts axaf axar axat axfr axfs axo- axoa axof axos axto axxo caaa caac caaf caas caat cac- caca cacc caco cacr cafa cafc caff cafs caor caos cara carc carf caro carr cars cart carx casa casc caso casr cass cast cat- cata catc catf cato cats catt caxa ccaa ccac ccaf ccar ccas ccat ccca cccc cccf cccs ccfa ccfc ccff ccoc ccra ccrc ccrf ccrs ccrt ccsa ccsf ccss ccst cctc cctt cfaa cfac cfao cfar cfax cfca cfcf cfco cfcs cffr cfoa cfor cfos cfox cfra cfrt cfrx cfsa cfsx cfta cftc cftr coas coat coax coca coco coct cofc coff cofs coft coof coos coot cor- cora corc corf coro corr cors cort cosa cosc coso coss cost cota cotc coto cots cott coxa crac craf crar cras crat crax crca crcc crcr crfc crfs croc croo cror crot crrt crsa crss crst crtc crtf crts csaa csac csao csar csas csat cscc cscf csco cscr cscs csfc csfr csor csos csot csox csra csrc csrs cssa cssr csta cstc csto cstr csts cstx csxt ctca ctcf ctfc ctfo ctfs ctor ctos ctot ctrc ctrs ctsa ctsc ctss ctta ctts cxfs cxro cxxx faaa faac faas faca facc facs fact fafa fafc faff fafo fara farc faro farr fars fart fasa fasc faso fass fast fata fatc fatf fato fats fatt fcar fcas fcat fcca fccf fcot fcra fcsc fcst fcto ffar ffcc ffff ffrr ffsa ffss fftf foaf foar foca foco focs fofo foof foos foot for- fora foro forr fors fort fosa foso foss fost fota foto fots fott foxx frac fras frat frax frcc frfc fros frot frsc frso frst frta fsas fscc fsfo fsra fssa fssc fssf fsta ft-c ftfc ftos ftrs ftsa ftsr oafc oafo oafs oara oars oasc oass oast oats ocac ocas ocat occa occc occt ocfa ocos ocra ocro ocrr ocrs ocsa oct- octa octo octs ofas