a-a a-b aaa aab aae aag aak aam aao aas ab- aba abb abe abg abk abm abo abs aea aeb aee aeg aek aem aeo aes ag- aga agb age agg agk agm ago ags aka akb ake akg akk akm ako aks ama amb ame amg amk amm amo ams aoa aob aoe aog aok aom aoo aos as- asa asb ase asg ask asm aso ass baa bab bae bag bak bam bao bas bba bbb bbe bbg bbk bbm bbo bbs be- bea beb bee beg bek bem beo bes bga bgb bge bgg bgk bgm bgo bgs bka bkb bke bkg bkk bkm bko bks bma bmb bme bmg bmk bmm bmo bms boa bob boe bog bok bom boo bos bsa bsb bse bsg bsk bsm bso bss eaa eab eae eag eak eam eao eas eba ebb ebe ebg ebk ebm ebo ebs eea eeb eee eeg eek eem eeo ees ega egb ege egg egm ego egs eka ekb eke ekg eko eks em- ema emb eme emg emk emm emo ems eo- eoa eob eoe eog eok eom eoo eos es- esa esb ese esg esk esm eso ess gaa gab gae gag gak gam gao gas gba gbe gbg gbk gbm gbo gbs ge- gea geb gee geg gek gem geo ges gga ggb ggg ggm ggo ggs gka gkb gkm gko gks gma gmb gme gmg gmm gmo gms goa gob goe gog gok gom goo gos gsa gsb gse gsg gsk gsm gso gss ka- kaa kab kae kag kak kam kao kas kba kbb kbe kbk kbm kbo kbs ke- kea keb kee keg kek kem keo kes kga kgb kgm kgo kgs kkb kke kkk kkm kks kma kmb kme kmg kmk kmm kmo kms koa kob koe kog kok kom koo kos ksa ksb kse ksg ksk ksm kso kss m-o maa mab mae mag mak mam mao mas mba mbb mbe mbg mbk mbm mbo mbs mea meb mee meg mek mem meo mes mga mgb mge mgk mgm mgo mgs mka mkb mke mkg mkk mkm mko mks mma mmb mme mmg mmk mmm mmo mms moa mob moe mog mok mom moo mos msa msb mse msg msk msm mso mss oaa oab oae oag oak oam oao oas ob- oba obb obe obg obk obm obo obs oea oeb oee oeg oem oeo oes oga oge ogg ogo ogs oka okb oke okg okk oko oks om- oma omb ome omg omm omo oms oo- ooa oob oog ook oom ooo oos os- osa osb ose osg osk osm oso oss saa sab sae sag sak sam sao sas sba sbb sbe sbg sbk sbm sbo sbs se- sea seb see seg sek sem seo ses sga sgb sge sgg sgk sgm sgo sgs sk- ska skb ske skg skk skm sko sks sma smb sme smg smk smm smo sms soa sob soe sog sok som soo sos ss- ssa ssb sse ssg ssk ssm sso sss