-er a-a a-b a-c a-t aaa aab aac aae aaf aag aam aan aao aar aat ab- aba abb abc abe abf abg abm abn abo abr abt ac- aca acb acc ace acf acg acm acn aco acr act aea aeb aec aee aef aeg aem aen aeo aer aet af- afa afb afc afe aff afg afm afn afo afr aft ag- aga agb agc age agf agg agm agn ago agr agt ama amb amc ame amf amg amm amn amo amr amt an- ana anb anc ane anf ang anm ann ano anr ant aoa aob aoc aoe aof aog aom aon aoo aor aot ar- ara arb arc are arf arg arm arn aro arr art at- ata atb atc ate atf atg atm atn ato atr att baa bab bac bae baf bag bam ban bao bar bat bba bbb bbc bbe bbf bbg bbm bbn bbo bbr bbt bca bcb bcc bce bcf bcg bcm bcn bco bcr bct be- bea beb bec bee bef beg bem ben beo ber bet bfa bfb bfc bfe bff bfg bfm bfn bfo bfr bft bga bgb bgc bge bgf bgg bgm bgn bgo bgr bgt bma bmb bmc bme bmf bmg bmm bmn bmo bmr bmt bna bnb bnc bne bnf bng bnn bno bnr bnt boa bob boc boe bof bog bom bon boo bor bot bra brb bre brf brg brm brn bro brr brt bta btb btc bte btf btg btm btn bto btr btt c-- caa cab cac cae caf cag cam can cao car cat cba cbb cbc cbe cbf cbg cbm cbn cbo cbr cbt cca ccb ccc cce ccf ccg ccm ccn cco ccr cct ce- cea ceb cec cee cef ceg cem cen ceo cer cet cfa cfb cfc cfe cff cfg cfm cfn cfo cfr cft cga cgb cgc cge cgg cgm cgn cgo cgr cgt cma cmb cmc cme cmf cmg cmm cmn cmo cmr cmt cn- cna cnb cnc cne cnf cng cnm cnn cno cnr cnt co- coa cob coc coe cof cog com con coo cor cot cra crb crc cre crf crg crm crn cro crr crt cta ctb ctc cte ctf ctg ctm ctn cto ctr ctt eaa eab eac eae eaf eag eam ean eao ear eat eba ebb ebc ebe ebf ebg ebm ebn ebo ebr ebt ec- eca ecb ecc ece ecf ecg ecm ecn eco ecr ect eea eeb eec eee eef eeg eem een eeo eer eet ef- efa efb efc efe eff efg efm efo efr eft ega egb egc ege egf egg egm egn ego egr egt em- ema emb emc eme emf emg emm emn emo emr emt en- ena enb enc ene enf eng enm enn eno enr ent eo- eoa eob eoc eoe eof eog eom eon eoo eor eot era erb erc ere erf erg erm ern ero err ert eta etb etc ete etf etg etm etn eto etr ett faa fab fac fae faf fag fam fan fao far fat fba fbb fbc fbe fbf fbg fbm fbn fbo fbr fbt fca fcb fcc fce fcf fcg fcm fcn fco fcr fct fea feb fec fee fef feg fem fen feo fer fet ffa ffc ffe fff ffg ffm ffn ffo ffr fft fga fgb fgc fge fgf fgg fgm fgn fgr fgt fma fmb fmc fme fmf fmg fmm fmn fmo fmr fmt fna fnb fnc fne fnf fng fnm fnn fnr fnt foa fob foc foe fof fog fom fon foo for fot fra frb frc fre frf frg frm frn fro frr frt fta ftb ftc fte ftf ftg ftm ftn fto ftr ftt gaa gab gac gae gaf gag gam gan gao gar gat gba gbc gbe gbf gbg gbm gbn gbo gbr gbt gca gcb gcc gce gcf gcg gcm gcn gco gcr gct ge- gea geb gec gee gef geg gem gen geo ger get gfa gfb gfc gfe gff gfm gfo gfr gft gga ggb ggc ggg ggm ggn ggo ggr ggt gma gmb gmc gme gmf gmg gmm gmn gmo gmr gmt gna gnb gnc gne gnf gnm gnn gno gnr gnt goa gob goc goe gof gog gom gon goo gor got gra grb grc gre grf grg grm grn gro grr grt gta gtb gtc gte gtf gtg gtm gtn gto gtr gtt m-f m-o m-r maa mab mac mae maf mag mam man mao mar mat mba mbb mbc mbe mbf mbg mbm mbo mbr mbt mc- mca mcb mcc mce mcf mcg mcm mcn mco mcr mct mea meb mec mee mef meg mem men meo mer met mfa mfb mfc mfe mff mfg mfm mfn mfo mfr mft mga mgb mgc mge mgf mgm mgn mgo mgr mgt mma mmb mmc mme mmf mmg mmm mmn mmo mmr mmt mna mnb mnc mne mnf mng mnm mnn mno mnr mnt moa mob moc moe mof mog mom mon moo mor mot mra mrb mrc mre mrf mrg mrm mrn mro mrr mrt mta mtb mtc mte mtf mtg mtm mtn mto mtr mtt naa nab nac nae naf nag nam nan nao nar nat nba nbb nbc nbe nbf nbg nbm nbn nbo nbr nbt nca ncb ncc nce ncf ncg ncm ncn nco ncr nct ne- nea neb nec nee nef neg nem nen neo ner net nfa nfb nfc nfe nff nfn nfo nfr nft nga ngb ngc nge ngf ngg ngm ngn ngo ngt nma nmb nmc nme nmg nmm nmn nmo nmr nmt nna nnb nnc nne nnf nng nnm nnn nno nnt no- noa nob noc noe nof nog nom non noo nor not nra nrb nrc nre nrf nrg nrm nrn nro nrr nrt nta ntb ntc nte ntf ntg ntm ntn nto ntr ntt oaa oab oac oae oaf oag oam oan oao oar oat ob- oba obb obc obe obf obg obm obn obo obr obt