a-a a-b aaa aab aag aah aan aas ab- aba abb abg abh abn abs ag- aga agb agg agh agn ags aha ahb ahg ahh ahn ahs an- ana anb ang anh ann ans as- asa asb asg ash asn ass baa bab bag bah ban bas bba bbb bbg bbh bbn bbs bga bgb bgg bgh bgn bgs bha bhb bhg bhh bhs bna bnb bng bnn bns bsa bsb bsg bsh bsn bss gaa gab gag gah gan gas gba gbg gbh gbn gbs gga ggb ggg ggh ggn ggs gha ghb ghg ghh ghn ghs gna gnb gnn gns gsa gsb gsg gsn gss haa hab hag hah han has hba hbb hbg hbh hbn hbs hga hgb hgg hgh hgn hgs hha hhb hhg hhh hhn hhs hna hnb hng hnh hnn hns hsa hsb hsg hsh hsn hss naa nab nag nah nan nas nba nbb nbg nbn nbs nga ngb ngg ngh ngn ngs nha nhb nhg nhh nhn nhs nna nnb nng nnh nnn nns nsa nsb nsg nsh nsn nss saa sab sag sah san sas sba sbb sbg sbh sbn sbs sga sgb sgg sgh sgn sgs sh- sha shb shg shh shn shs sna snb sng snn sns ss- ssa ssb ssg ssh ssn sss