a-a a-b aaa aab aae aag aam aao aas ab- aba abb abe abg abm abo abs aea aeb aee aeg aem aeo aes ag- aga agb age agg agm ago ags ama amb ame amg amm amo ams aoa aob aoe aog aom aoo aos as- asa asb ase asg asm aso ass baa bab bae bag bam bao bas bba bbb bbe bbg bbm bbo bbs be- bea beb bee beg bem beo bes bga bgb bge bgg bgm bgo bgs bma bmb bme bmg bmm bmo bms boa bob boe bog bom boo bos bsa bsb bse bsg bsm bso bss eaa eab eae eag eam eao eas eba ebb ebe ebg ebm ebo ebs eea eeb eee eeg eem eeo ees ega egb ege egg egm ego egs em- ema emb eme emg emm emo ems eo- eoa eob eoe eog eom eoo eos es- esa esb ese esg esm eso ess gaa gab gae gag gam gao gas gba gbe gbg gbm gbo gbs ge- gea geb gee geg gem geo ges gga ggb ggg ggm ggo ggs gma gmb gme gmg gmm gmo gms goa gob goe gog gom goo gos gsa gsb gse gsg gsm gso gss m-o maa mab mae mag mam mao mas mba mbb mbe mbg mbm mbo mbs mea meb mee meg mem meo mes mga mgb mge mgm mgo mgs mma mmb mme mmg mmm mmo mms moa mob moe mog mom moo mos msa msb mse msg msm mso mss oaa oab oae oag oam oao oas ob- oba obb obe obg obm obo obs oea oeb oee oeg oem oeo oes oga oge ogg ogo ogs om- oma omb ome omg omm omo oms oo- ooa oob oog oom ooo oos os- osa osb ose osg osm oso oss saa sab sae sag sam sao sas sba sbb sbe sbg sbm sbo sbs se- sea seb see seg sem seo ses sga sgb sge sgg sgm sgo sgs sma smb sme smg smm smo sms soa sob soe sog som soo sos ss- ssa ssb sse ssg ssm sso sss