a-a a-b a-c a-t aaa aab aac aaf aak aam aan aao aar aat ab- aba abb abc abf abk abm abn abo abr abt ac- aca acb acc acf ack acm acn aco acr act af- afa afb afc aff afk afm afn afo afr aft aka akb akc akk akm akn ako akr ama amb amc amf amk amm amn amo amr amt an- ana anb anc anf ank anm ann ano anr ant aoa aob aoc aof aok aom aon aoo aor aot ar- ara arb arc arf ark arm arn aro arr art at- ata atb atc atf atm atn ato atr att baa bab bac baf bak bam ban bao bar bat bba bbb bbc bbf bbk bbm bbn bbo bbr bbt bca bcb bcc bcf bck bcm bcn bco bcr bct bfa bfb bfc bff bfm bfn bfo bfr bft bka bkb bkc bkf bkk bkm bkn bko bkr bkt bma bmb bmc bmf bmk bmm bmn bmo bmr bmt bna bnb bnc bnf bnk bnn bno bnr bnt boa bob boc bof bok bom bon boo bor bot bra brb brf brk brm brn bro brr brt bta btb btc btf btk btm btn bto btr btt c-- caa cab cac caf cak cam can cao car cat cba cbb cbc cbf cbk cbm cbn cbo cbr cbt cca ccb ccc ccf cck ccm ccn cco ccr cct cfa cfb cfc cff cfk cfm cfn cfo cfr cft cka ckb ckc ckm cko ckt cma cmb cmc cmf cmk cmm cmn cmo cmr cmt cn- cna cnb cnc cnf cnm cnn cno cnr cnt co- coa cob coc cof cok com con coo cor cot cra crb crc crf crk crm crn cro crr crt cta ctb ctc ctf ctk ctm ctn cto ctr ctt faa fab fac faf fak fam fan fao far fat fba fbb fbc fbf fbk fbm fbn fbo fbr fbt fca fcb fcc fcf fck fcm fcn fco fcr fct ffa ffc fff ffk ffm ffn ffo ffr fft fka fkb fkc fkf fkk fkm fkt fma fmb fmc fmf fmm fmn fmo fmr fmt fna fnb fnc fnf fnk fnm fnn fnr fnt foa fob foc fof fok fom fon foo for fot fra frb frc frf frk frm frn fro frr frt fta ftb ftc ftf ftk ftm ftn fto ftr ftt k-t ka- kaa kab kac kaf kak kam kan kao kar kat kba kbb kbc kbf kbk kbm kbn kbo kbr kca kcb kcc kck kcm kcn kcr kct kfa kfc kff kfm kfo kkb kkc kkk kkm kkn kkr kkt kma kmb kmc kmf kmk kmm kmo kmt kn- kna knc knf knk knm knn kno knr knt koa kob koc kof kok kom kon koo kor kot kra krc krf krk krn kro krr krt kta ktb ktc ktf ktk ktm ktn kto ktr ktt m-f m-o m-r maa mab mac maf mak mam man mao mar mat mba mbb mbc mbf mbk mbm mbo mbr mbt mc- mca mcb mcc mcf mck mcm mcn mco mcr mct mfa mfb mfc mff mfm mfn mfo mfr mft mka mkb mkc mkk mkm mkn mko mkr mkt mma mmb mmc mmf mmk mmm mmn mmo mmr mmt mna mnb mnc mnf mnk mnm mnn mno mnr mnt moa mob moc mof mok mom mon moo mor mot mra mrb mrc mrf mrk mrm mrn mro mrr mrt mta mtb mtc mtf mtk mtm mtn mto mtr mtt naa nab nac naf nak nam nan nao nar nat nba nbb nbc nbf nbk nbm nbn nbo nbr nbt nca ncb ncc ncf nck ncm ncn nco ncr nct nfa nfb nfc nff nfk nfn nfo nfr nft nka nkc nkf nkk nkm nkn nko nkr nkt nma nmb nmc nmk nmm nmn nmo nmr nmt nna nnb nnc nnf nnk nnm nnn nno nnt no- noa nob noc nof nok nom non noo nor not nra nrb nrc nrf nrk nrm nrn nro nrr nrt nta ntb ntc ntf ntk ntm ntn nto ntr ntt oaa oab oac oaf oak oam oan oao oar oat ob- oba obb obc obf obk obm obn obo obr obt oc- oca ocb occ ocf ock ocm ocn oco ocr oct of- ofa ofb ofc off ofm ofn ofo ofr oft oka okb okc okk oko okr om- oma omb omc omf omm omn omo omr omt on- ona onb onc onf onk onn ono onr ont oo- ooa oob ooc oof ook oom oon ooo oor oot or- ora orb orc orf ork orm orn oro orr ort ot- ota otb otc otf otk otm otn oto otr ott ra- raa rab rac raf rak ram ran rao rar rat rba rbb rbc rbf rbk rbm rbn rbo rbr rbt rca rcb rcc rcf rcm rcn rco rcr rct rfa rfb rfc rff rfk rfm rfn rfo rfr rft rkb rkc rkf rkk rkm rko rkt rma rmb rmc rmf rmm rmn rmo rmr rmt rna rnb rnc rnm rnn rno rnr rnt roa rob roc rof rok rom ron roo ror rot rra rrb rrc rrf rrk rrm rrn rrr rrt rta rtb rtc rtf rtk rtm rtn rto rtr rtt taa tab tac taf tak tam tan tao tar tat tba tbb tbc tbf tbk tbm tbn tbo tbr tbt tca tcb tcc tcf tck tcm tcn tco tcr tct tfa tfb tfc tff tfk tfm tfn tfo tfr tft tka tkb tkc tkk tkm tko tkr tkt tma tmb tmc tmf tmk tmm tmn tmo tmr tmt tna tnb tnc tnf tnk tnm tnn tno tnr tnt to- toa tob toc tof tok tom ton too tor tot tra trb trc trf trk trm trn tro trr trt tta ttb ttc ttf ttk ttm ttn tto ttr ttt

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