a-a a-b a-c a-t aaa aab aac aaf aao aar aat aav ab- aba abb abc abf abo abr abt abv ac- aca acb acc acf aco acr act acv af- afa afb afc aff afo afr aft afv aoa aob aoc aof aoo aor aot aov ar- ara arb arc arf aro arr art arv at- ata atb atc atf ato atr att atv av- ava avb avc avf avo avr avt baa bab bac baf bao bar bat bav bba bbb bbc bbf bbo bbr bbt bca bcb bcc bcf bco bcr bct bcv bfa bfb bfc bff bfo bfr bft bfv boa bob boc bof boo bor bot bov bra brb brf bro brr brt brv bta btb btc btf bto btr btt btv bva bvb bvc bvo bvr bvt bvv c-- caa cab cac caf cao car cat cav cba cbb cbc cbf cbo cbr cbt cbv cca ccb ccc ccf cco ccr cct ccv cfa cfb cfc cff cfo cfr cft cfv co- coa cob coc cof coo cor cot cov cra crb crc crf cro crr crt crv cta ctb ctc ctf cto ctr ctt ctv cva cvb cvc cvf cvo cvr cvt cvv faa fab fac faf fao far fat fav fba fbb fbc fbf fbo fbr fbt fca fcb fcc fcf fco fcr fct fcv ffa ffc fff ffo ffr fft ffv foa fob foc fof foo for fot fra frb frc frf fro frr frt fta ftb ftc ftf fto ftr ftt ftv fva fvc fvt oaa oab oac oaf oao oar oat oav ob- oba obb obc obf obo obr obt obv oc- oca ocb occ ocf oco ocr oct ocv of- ofa ofb ofc off ofo ofr oft ofv oo- ooa oob ooc oof ooo oor oot oov or- ora orb orc orf oro orr ort orv ot- ota otb otc otf oto otr ott otv ov- ova ovb ovc ovf ovo ovv ra- raa rab rac raf rao rar rat rav rba rbb rbc rbf rbo rbr rbt rca rcb rcc rcf rco rcr rct rcv rfa rfb rfc rff rfo rfr rft rfv roa rob roc rof roo ror rot rov rra rrb rrc rrf rrr rrt rta rtb rtc rtf rto rtr rtt rtv rva rvb rvc rvf rvo rvr rvt rvv taa tab tac taf tao tar tat tav tba tbb tbc tbf tbo tbr tbt tbv tca tcb tcc tcf tco tcr tct tcv tfa tfb tfc tff tfo tfr tft to- toa tob toc tof too tor tot tov tra trb trc trf tro trr trt trv tta ttb ttc ttf tto ttr ttt ttv tva tvb tvc tvf tvo tvr tvt v-a vaa vab vac vao var vat vav vba vbc vbo vbr vbv vca vcc vcf vco vcr vct vfa vfb vfc vff vfr vft vfv voa vob voc vof voo vor vot vov vra vrb vrc vrf vrr vrt vta vtb vtc vto vtr vtt vtv vva vvb vvc vvo vvr vvt vvv

-vac aaaa aaab aaac aaaf aaar aaav aaba aabb aabc aabt aaca aacb aacc aacf aaco aacr aact aacv aafa aafb aafc aaff aaoo aara aarc aaro aart aata aatc aatf aatt aava abaa abab abac abaf abar abat abb- abba abbb abbo abbr abbt abca abcb abcc abcf abcr abct abff aboa abob abof aboo abor abot abov abra abrc abro abta abva ac-t acaa acab acac acar acat acba acca accc accf acco acct acfc acft acoa acor acot acr- acra acrc acro acrr acrv acta actc actf acto actt actv acvv afaa afao afar afat afca afcb afcc affa affc affo afft afoa afoo afor afr- afra afrc afro afta aftc aoba aoca aora aorb aort aotc aotf arab arac araf arar arat arba arc- arca arco arct arfa arfb arfc arff arft aroa arob aroo aror arr- arra arrc arro arrr arrt arta artc arto artr artv arva arvo at-t ataa atab atac atar atat atca atcc atcf atco atcr atfb atfc atob atoc atof ator atot atra atrc atro atta atto attr avab avao avar avat avcc avco avor avot avra avro avva avvo baaa baaf baar baat baba babb babo babr bac- baca bacc baco bact bafc baff bafo baft bar- bara barb barc barf baro barr bart bata batc batf bato batt bava bbbb bbfc bbrc bcaa bcar bcat bcbc bcca bccc bcfc bcof bcor bcra bctc bcvo bfca bfta bftt boab boac boar boat boba bobb bobo boca boco bofa boff boob booc boof boor boot bor- bora borf boro borr bort bota botb boto bott bova bovo brab brac braf brao brat brav brca brcb brfc broa brob broc broo bror brot brrr brtc btaa btaf btcc btfc btob btor btrc btrt bttb c-bo caaa caab caac caaf caat caba cabf cabo cac- caca cacc caco cacr cafa cafb cafc caff caor cara carb carc carf caro carr cart cat- cata catb catc catf cato catt catv cava cavo cbac cbar cbat cbbc cbca cbcc cbcr cbct cbfb cbfc cbot cbrt cbta cbtc cbtf cbtv cbva cbvb cbvf cbvr ccaa ccab ccac ccaf ccar ccat ccba ccbc ccca cccb cccc cccf cccv ccfa ccfc ccff ccob ccoc ccra ccrc ccrf ccrt cctb cctc cctt cctv ccvo cfaa cfab cfac cfao cfar cfav cfbc cfbr cfbt cfbv cfca cfcb cfcf cfco cffb cffr cfoa cfor cfra cfrb cfrt cfta cftc cftr coat coba cobb cobo coca coco coct cofc coff coft coob coof coot cor- cora corb corc corf coro corr cort cota cotb cotc coto cott cova covo crab crac craf crar crat crbc crca crcc crcr crfc crob croc croo cror crot crrt crtc crtf crtv ctab ctba ctca ctcf ctfc ctfo ctor ctot ctrc ctta ctvo ctvt cvac cvar cvca cvcc cvfr cvra cvrr faaa faac faba fabo faca facc fact fafa fafc faff fafo fara farb farc faro farr fart fata fatc fatf fato fatt fava favc fbar fcab fcar fcat fcba fcca fccf fcot