a-a a-b aaa aab aag aam aan aas ab- aba abb abg abm abn abs ag- aga agb agg agm agn ags ama amb amg amm amn ams an- ana anb ang anm ann ans as- asa asb asg asm asn ass baa bab bag bam ban bas bba bbb bbg bbm bbn bbs bga bgb bgg bgm bgn bgs bma bmb bmg bmm bmn bms bna bnb bng bnn bns bsa bsb bsg bsm bsn bss gaa gab gag gam gan gas gba gbg gbm gbn gbs gga ggb ggg ggm ggn ggs gma gmb gmg gmm gmn gms gna gnb gnm gnn gns gsa gsb gsg gsm gsn gss maa mab mag mam man mas mba mbb mbg mbm mbs mga mgb mgm mgn mgs mma mmb mmg mmm mmn mms mna mnb mng mnm mnn mns msa msb msg msm msn mss naa nab nag nam nan nas nba nbb nbg nbm nbn nbs nga ngb ngg ngm ngn ngs nma nmb nmg nmm nmn nms nna nnb nng nnm nnn nns nsa nsb nsg nsm nsn nss saa sab sag sam san sas sba sbb sbg sbm sbn sbs sga sgb sgg sgm sgn sgs sma smb smg smm smn sms sna snb sng snm snn sns ss- ssa ssb ssg ssm ssn sss