a-a a-b a-c a-t aaa aab aac aad aaf aak aar aat ab- aba abb abc abd abf abk abr abt ac- aca acb acc acd acf ack acr act ad- ada adb adc add adf adk adr adt af- afa afb afc afd aff afk afr aft aka akb akc akd akk akr ar- ara arb arc ard arf ark arr art at- ata atb atc atd atf atr att baa bab bac bad baf bak bar bat bba bbb bbc bbd bbf bbk bbr bbt bca bcb bcc bcd bcf bck bcr bct bda bdb bdc bdd bdf bdk bdr bdt bfa bfb bfc bfd bff bfr bft bka bkb bkc bkf bkk bkr bkt bra brb brd brf brk brr brt bta btb btc btd btf btk btr btt c-- caa cab cac cad caf cak car cat cba cbb cbc cbd cbf cbk cbr cbt cca ccb ccc ccd ccf cck ccr cct cda cdb cdc cdd cdf cdk cdr cdt cfa cfb cfc cfd cff cfk cfr cft cka ckb ckc ckd ckt cra crb crc crd crf crk crr crt cta ctb ctc ctd ctf ctk ctr ctt daa dab dac dad daf dak dar dat dba dbb dbc dbd dbf dbk dbr dbt dca dcb dcc dcd dcf dck dcr dct dda ddb ddc ddd ddf ddk ddr ddt dfa dfb dfc dfd dff dfk dfr dft dka dkb dkc dkk dkr dkt dra drb drc drd drk drr drt dta dtb dtc dtd dtf dtk dtr dtt faa fab fac fad faf fak far fat fba fbb fbc fbd fbf fbk fbr fbt fca fcb fcc fcd fcf fck fcr fct fda fdb fdc fdd fdf fdk fdr fdt ffa ffc ffd fff ffk ffr fft fka fkb fkc fkf fkk fkt fra frb frc frd frf frk frr frt fta ftb ftc ftd ftf ftk ftr ftt k-t ka- kaa kab kac kad kaf kak kar kat kba kbb kbc kbd kbf kbk kbr kca kcb kcc kcd kck kcr kct kda kdb kdc kdf kdk kdr kdt kfa kfc kfd kff kkb kkc kkk kkr kkt kra krc krd krf krk krr krt kta ktb ktc ktf ktk ktr ktt ra- raa rab rac rad raf rak rar rat rba rbb rbc rbd rbf rbk rbr rbt rca rcb rcc rcd rcf rcr rct rda rdb rdc rdd rdf rdr rdt rfa rfb rfc rfd rff rfk rfr rft rkb rkc rkf rkk rkt rra rrb rrc rrd rrf rrk rrr rrt rta rtb rtc rtd rtf rtk rtr rtt taa tab tac tad taf tak tar tat tba tbb tbc tbd tbf tbk tbr tbt tca tcb tcc tcd tcf tck tcr tct tda tdb tdc tdd tdf tdk tdr tdt tfa tfb tfc tfd tff tfk tfr tft tka tkb tkc tkk tkr tkt tra trb trc trd trf trk trr trt tta ttb ttc ttd ttf ttk ttr ttt

a-ak aaaa aaab aaac aaad aaaf aaar aaba aabb aabc aabd aabt aaca aacb aacc aacd aacf aack aacr aact aada aadc aadt aafa aafb aafc aafd aaff aaka aara aarc aard aart aata aatc aatf aatk aatt abaa abab abac abad abaf abak abar abat abb- abba abbb abbr abbt abca abcb abcc abcd abcf abcr abct abda abff abra abrc abta ac-t acaa acab acac acad acar acat acba acca accc accd accf acct acda acdb acdc acdf acdt acfc acfd acft ackd acr- acra acrc acrr acta actc actf actt adaa adab adac adad adak adar adat adba adbc adcc adda addc addd addr adfa adfc adra adta afaa afad afak afar afat afca afcb afcc afdb afdc affa affc afft afka afkr afr- afra afrc afta aftc akaa akar akca akka akr- akra arab arac arad araf arak arar arat arba arc- arca arct arda ardc ardf arfa arfb arfc arff arft arka arr- arra arrc arrk arrr arrt arta artc artr at-t ataa atab atac atad atak atar atat atca atcc atcf atck atcr atdt atfb atfc atka atkt atra atrc atrk atta attr baaa baad baaf baak baar baat baba babb babr bac- baca bacc back bact bada badb badd badr bafc baff baft bak- baka bakr bakt bar- bara barb barc bard barf bark barr bart bata batc batf batt bbad bbbb bbdd bbfc bbrc bcaa bcar bcat bcbc bcca bccc bcda bcfc bcra bctc bd-r bdbc bddc bfca bfta bftt brab brac brad braf brak brat brca brcb brda brdt brfc brka brkb brrr brtc btaa btaf btcc btdt btfc btrc btrt bttb c-cd caaa caab caac caaf caat caba cabf cac- caca cacc cack cacr cada cadc cadd cadr cafa cafb cafc caff caka cara carb carc card carf cark carr cart cat- cata catb catc catd catf catt cbac cbar cbat cbbc cbca cbcc cbcr cbct cbdb cbdc cbfb cbfc cbka cbkr cbrd cbrt cbta cbtc cbtf ccaa ccab ccac ccad ccaf ccar ccat ccba ccbc ccca cccb cccc cccf ccdc ccdf ccdr ccfa ccfc ccfd ccff ccra ccrc ccrf ccrt cctb cctc cctt cd-r cdaa cdac cdad cdba cdbf cdda cddb cddr cdfa cfaa cfab cfac cfar cfbc cfbr cfbt cfca cfcb cfcf cfda cffb cffr cfra cfrb cfrt cfta cftc cftk cftr ckac ckat ckbc ckck ckfr ckrc ckrd cktb crab crac craf crar crat crbc crca crcc crcr crda crdc crfc crkc crrt crtc crtf ctab ctba ctca ctcf ctfc ctrc ctta daab daad daar daba dabb dabt daca dact dada dafa dafc daff daft daka dara darb darc dard darf dark darr dart data datr datt dbar dbcc dbfc dbtt dcbc dcca dccb dccc dcct dcdb dcfc dcra dcrk dctc dddd ddrc dfaf dfcc dfdt dffa dfrf dftr dkba dkdc draa drab drac drad draf drak drar drat drba drbc drca drda drfc drra dtaa dtac dtcc dtfc f--k faaa faac faad faba fabd faca facc fack fact fada fadd fafa fafc faff fakt fara farb farc fard fark farr fart fata fatc fatf