a-a a-b a-c a-t aaa aab aac aad aaf aak aam aan aao aar aat ab- aba abb abc abd abf abk abm abn abo abr abt ac- aca acb acc acd acf ack acm acn aco acr act ad- ada adb adc add adf adk adm adn ado adr adt af- afa afb afc afd aff afk afm afn afo afr aft aka akb akc akd akk akm akn ako akr ama amb amc amd amf amk amm amn amo amr amt an- ana anb anc and anf ank anm ann ano anr ant aoa aob aoc aod aof aok aom aon aoo aor aot ar- ara arb arc ard arf ark arm arn aro arr art at- ata atb atc atd atf atm atn ato atr att baa bab bac bad baf bak bam ban bao bar bat bba bbb bbc bbd bbf bbk bbm bbn bbo bbr bbt bca bcb bcc bcd bcf bck bcm bcn bco bcr bct bda bdb bdc bdd bdf bdk bdm bdo bdr bdt bfa bfb bfc bfd bff bfm bfn bfo bfr bft bka bkb bkc bkf bkk bkm bkn bko bkr bkt bma bmb bmc bmd bmf bmk bmm bmn bmo bmr bmt bna bnb bnc bnd bnf bnk bnn bno bnr bnt boa bob boc bod bof bok bom bon boo bor bot bra brb brd brf brk brm brn bro brr brt bta btb btc btd btf btk btm btn bto btr btt c-- caa cab cac cad caf cak cam can cao car cat cba cbb cbc cbd cbf cbk cbm cbn cbo cbr cbt cca ccb ccc ccd ccf cck ccm ccn cco ccr cct cda cdb cdc cdd cdf cdk cdm cdn cdo cdr cdt cfa cfb cfc cfd cff cfk cfm cfn cfo cfr cft cka ckb ckc ckd ckm cko ckt cma cmb cmc cmd cmf cmk cmm cmn cmo cmr cmt cn- cna cnb cnc cnd cnf cnm cnn cno cnr cnt co- coa cob coc cod cof cok com con coo cor cot cra crb crc crd crf crk crm crn cro crr crt cta ctb ctc ctd ctf ctk ctm ctn cto ctr ctt daa dab dac dad daf dak dam dan dao dar dat dba dbb dbc dbd dbf dbk dbm dbn dbo dbr dbt dca dcb dcc dcd dcf dck dcm dcn dco dcr dct dda ddb ddc ddd ddf ddk ddm ddn ddo ddr ddt dfa dfb dfc dfd dff dfk dfm dfn dfo dfr dft dka dkb dkc dkk dkm dko dkr dkt dma dmb dmc dmd dmf dmk dmm dmn dmo dmr dmt dna dnb dnc dnd dnf dnk dnm dnn dno dnr dnt doa dob doc dod dof dok dom don doo dor dot dra drb drc drd drk drm drn dro drr drt dta dtb dtc dtd dtf dtk dtm dtn dto dtr dtt faa fab fac fad faf fak fam fan fao far fat fba fbb fbc fbd fbf fbk fbm fbn fbo fbr fbt fca fcb fcc fcd fcf fck fcm fcn fco fcr fct fda fdb fdc fdd fdf fdk fdm fdn fdo fdr fdt ffa ffc ffd fff ffk ffm ffn ffo ffr fft fka fkb fkc fkf fkk fkm fkt fma fmb fmc fmd fmf fmm fmn fmo fmr fmt fna fnb fnc fnd fnf fnk fnm fnn fnr fnt foa fob foc fof fok fom fon foo for fot fra frb frc frd frf frk frm frn fro frr frt fta ftb ftc ftd ftf ftk ftm ftn fto ftr ftt k-t ka- kaa kab kac kad kaf kak kam kan kao kar kat kba kbb kbc kbd kbf kbk kbm kbn kbo kbr kca kcb kcc kcd kck kcm kcn kcr kct kda kdb kdc kdf kdk kdm kdo kdr kdt kfa kfc kfd kff kfm kfo kkb kkc kkk kkm kkn kkr kkt kma kmb kmc kmd kmf kmk kmm kmo kmt kn- kna knc knd knf knk knm knn kno knr knt koa kob koc kod kof kok kom kon koo kor kot kra krc krd 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 mad maf mak mam man mao mar mat mba mbb mbc mbd mbf mbk mbm mbo mbr mbt mc- mca mcb mcc mcd mcf mck mcm mcn mco mcr mct mda mdb mdc mdd mdf mdk mdm mdn mdo mdr mdt mfa mfb mfc mfd mff mfm mfn mfo mfr mft mka mkb mkc mkd mkk mkm mkn mko mkr mkt mma mmb mmc mmd mmf mmk mmm mmn mmo mmr mmt mna mnb mnc mnf mnk mnm mnn mno mnr mnt moa mob moc mod mof mok mom mon moo mor mot mra mrb mrc mrd mrf mrk mrm mrn mro mrr mrt mta mtb mtc mtd mtf mtk mtm mtn mto mtr mtt naa nab nac nad naf nak nam nan nao nar nat nba nbb nbc nbd nbf nbk nbm nbn nbo nbr nbt nca ncb ncc ncd ncf nck ncm ncn nco ncr nct nda ndb ndc ndd ndf ndk ndm ndn ndo ndr ndt nfa nfb nfc nfd nff nfk nfn nfo nfr nft nka nkc nkf nkk nkm nkn nko nkr nkt nma nmb nmc nmd nmk nmm nmn nmo nmr nmt nna nnb nnc nnf nnk nnm nnn nno nnt no- noa nob noc nod nof nok nom non noo nor not nra nrb nrc nrd nrf nrk nrm nrn nro nrr nrt nta ntb ntc ntd ntf ntk ntm ntn nto ntr ntt oaa oab oac oad oaf oak oam oan oao oar oat ob- oba obb obc obd obf obk obm obn obo obr obt oc- oca ocb occ ocd ocf ock ocm ocn oco ocr oct oda odb odc odd odf odm odn odo odr odt of- ofa ofb ofc ofd off ofm ofn ofo ofr oft oka okb okc okd okk oko okr om- oma