a-a a-b a-c a-t aaa aab aac aaf aak aan aao aap aar aat ab- aba abb abc abf abk abn abo abp abr abt ac- aca acb acc acf ack acn aco acp acr act af- afa afb afc aff afk afn afo afp afr aft aka akb akc akk akn ako akp akr an- ana anb anc anf ank ann ano anp anr ant aoa aob aoc aof aok aon aoo aop aor aot ap- apa apb apc apf apk apn apo app apr apt ar- ara arb arc arf ark arn aro arp arr art at- ata atb atc atf atn ato atp atr att b-p baa bab bac baf bak ban bao bap bar bat bba bbb bbc bbf bbk bbn bbo bbp bbr bbt bca bcb bcc bcf bck bcn bco bcp bcr bct bfa bfb bfc bff bfn bfo bfp bfr bft bka bkb bkc bkf bkk bkn bko bkp bkr bkt bna bnb bnc bnf bnk bnn bno bnp bnr bnt boa bob boc bof bok bon boo bop bor bot bpa bpb bpc bpf bpn bpo bpp bpr bpt bra brb brf brk brn bro brp brr brt bta btb btc btf btk btn bto btp btr btt c-- caa cab cac caf cak can cao cap car cat cba cbb cbc cbf cbk cbn cbo cbp cbr cbt cca ccb ccc ccf cck ccn cco ccp ccr cct cfa cfb cfc cff cfk cfn cfo cfp cfr cft cka ckb ckc cko ckt cn- cna cnb cnc cnf cnn cno cnp cnr cnt co- coa cob coc cof cok con coo cop cor cot cpa cpb cpc cpf cpk cpn cpo cpp cpr cpt cra crb crc crf crk crn cro crp crr crt cta ctb ctc ctf ctk ctn cto ctp ctr ctt faa fab fac faf fak fan fao fap far fat fba fbb fbc fbf fbk fbn fbo fbp fbr fbt fca fcb fcc fcf fck fcn fco fcp fcr fct ffa ffc fff ffk ffn ffo ffp ffr fft fka fkb fkc fkf fkk fkp fkt fna fnb fnc fnf fnk fnn fnp fnr fnt foa fob foc fof fok fon foo fop for fot fpa fpb fpc fpk fpn fpo fpp fpr fpt fra frb frc frf frk frn fro frp frr frt fta ftb ftc ftf ftk ftn fto ftp ftr ftt k-t ka- kaa kab kac kaf kak kan kao kap kar kat kba kbb kbc kbf kbk kbn kbo kbp kbr kca kcb kcc kck kcn kcp kcr kct kfa kfc kff kfo kkb kkc kkk kkn kkp kkr kkt kn- kna knc knf knk knn kno knp knr knt koa kob koc kof kok kon koo kop kor kot kpa kpc kpf kpk kpn kpo kpp kpr kpt kra krc krf krk krn kro krp krr krt kta ktb ktc ktf ktk ktn kto ktp ktr ktt naa nab nac naf nak nan nao nap nar nat nba nbb nbc nbf nbk nbn nbo nbp nbr nbt nca ncb ncc ncf nck ncn nco ncp ncr nct nfa nfb nfc nff nfk nfn nfo nfp nfr nft nka nkc nkf nkk nkn nko nkp nkr nkt nna nnb nnc nnf nnk nnn nno nnp nnt no- noa nob noc nof nok non noo nop nor not npa npb npc npf npn npo npp npr npt nra nrb nrc nrf nrk nrn nro nrp nrr nrt nta ntb ntc ntf ntk ntn nto ntp ntr ntt oaa oab oac oaf oak oan oao oap oar oat ob- oba obb obc obf obk obn obo obp obr obt oc- oca ocb occ ocf ock ocn oco ocp ocr oct of- ofa ofb ofc off ofn ofo ofp ofr oft oka okb okc okk oko okp okr on- ona onb onc onf onk onn ono onp onr ont oo- ooa oob ooc oof ook oon ooo oop oor oot op- opa opb opc opf opk opn opo opp opr opt or- ora orb orc orf ork orn oro orp orr ort ot- ota otb otc otf otk otn oto otp otr ott p-p paa pab pac paf pak pan pao pap par pat pba pbb pbc pbf pbk pbn pbo pbp pbr pbt pca pcb pcc pcf pck pcn pco pcp pcr pct pfa pfb pfc pff pfk pfn pfo pfp pfr pft pka pkb pkc pkf pkn pko pkp pkr pkt pn- pna pnb pnc pnf pnk pnn pno pnp pnr pnt poa pob poc pof pok pon poo pop por pot ppa ppb ppc ppf ppk ppn ppo ppp ppr ppt pra prb prc prf prk prn pro prp prr prt pt- pta ptb ptc ptf ptk ptn pto ptp ptr ptt ra- raa rab rac raf rak ran rao rap rar rat rba rbb rbc rbf rbk rbn rbo rbp rbr rbt rca rcb rcc rcf rcn rco rcp rcr rct rfa rfb rfc rff rfk rfn rfo rfp rfr rft rkb rkc rkf rkk rko rkp rkt rna rnb rnc rnn rno rnp rnr rnt roa rob roc rof rok ron roo rop ror rot rpa rpb rpc rpf rpk rpn rpo rpp rpr rpt rra rrb rrc rrf rrk rrn rrp rrr rrt rta rtb rtc rtf rtk rtn rto rtp rtr rtt taa tab tac taf tak tan tao tap tar tat tba tbb tbc tbf tbk tbn tbo tbp tbr tbt tca tcb tcc tcf tck tcn tco tcp tcr tct tfa tfb tfc tff tfk tfn tfo tfp tfr tft tka tkb tkc tkk tko tkp tkr tkt tna tnb tnc tnf tnk tnn tno tnp tnr tnt to- toa tob toc tof tok ton too top tor tot tpa tpb tpc tpf tpk tpn tpo tpp tpr tpt tra trb trc trf trk trn tro trp trr trt tta ttb ttc ttf ttk ttn tto ttp ttr ttt

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