a-a a-b aaa aab aag aam aan aar aas ab- aba abb abg abm abn abr abs ag- aga agb agg agm agn agr ags ama amb amg amm amn amr ams an- ana anb ang anm ann anr ans ar- ara arb arg arm arn arr ars as- asa asb asg asm asn asr ass baa bab bag bam ban bar bas bba bbb bbg bbm bbn bbr bbs bga bgb bgg bgm bgn bgr bgs bma bmb bmg bmm bmn bmr bms bna bnb bng bnn bnr bns bra brb brg brm brn brr brs bsa bsb bsg bsm bsn bsr bss gaa gab gag gam gan gar gas gba gbg gbm gbn gbr gbs gga ggb ggg ggm ggn ggr ggs gma gmb gmg gmm gmn gmr gms gna gnb gnm gnn gnr gns gra grb grg grm grn grr grs gsa gsb gsg gsm gsn gsr gss m-r maa mab mag mam man mar mas mba mbb mbg mbm mbr mbs mga mgb mgm mgn mgr mgs mma mmb mmg mmm mmn mmr mms mna mnb mng mnm mnn mnr mns mra mrb mrg mrm mrn mrr mrs msa msb msg msm msn msr mss naa nab nag nam nan nar nas nba nbb nbg nbm nbn nbr nbs nga ngb ngg ngm ngn ngs nma nmb nmg nmm nmn nmr nms nna nnb nng nnm nnn nns nra nrb nrg nrm nrn nrr nrs nsa nsb nsg nsm nsn nsr nss ra- raa rab rag ram ran rar ras rba rbb rbg rbm rbn rbr rbs rga rgb rgg rgn rgr rgs rma rmb rmg rmm rmn rmr rms rna rnb rng rnm rnn rnr rns rra rrb rrg rrm rrn rrr rrs rsa rsb rsg rsm rsn rsr rss saa sab sag sam san sar sas sba sbb sbg sbm sbn sbr sbs sga sgb sgg sgm sgn sgr sgs sma smb smg smm smn smr sms sna snb sng snm snn snr sns sr- sra srb srg srm srn srr srs ss- ssa ssb ssg ssm ssn ssr sss