a-a a-b a-z aaa aab aag aan aas aaz ab- aba abb abg abn abs abz ag- aga agb agg agn ags agz an- ana anb ang ann ans anz as- asa asb asg asn ass asz az- aza azb azg azn azs azz baa bab bag ban bas baz bba bbb bbg bbn bbs bga bgb bgg bgn bgs bgz bna bnb bng bnn bns bnz bsa bsb bsg bsn bss bza bzn bzs bzz gaa gab gag gan gas gaz gba gbg gbn gbs gbz gga ggb ggg ggn ggs ggz gna gnb gnn gns gsa gsb gsg gsn gss gza naa nab nag nan nas naz nba nbb nbg nbn nbs nga ngb ngg ngn ngs nna nnb nng nnn nns nnz nsa nsb nsg nsn nss nsz nzb nzg nzs nzz saa sab sag san sas saz sba sbb sbg sbn sbs sga sgb sgg sgn sgs sna snb sng snn sns ss- ssa ssb ssg ssn sss ssz sza z-g zaa zab zag zan zas zaz zbb zbs zgb zgg zgs znn zns zsa zsg zsz zzs zzz