a-a a-b a-z aaa aab aag aan aar aaz ab- aba abb abg abn abr abz ag- aga agb agg agn agr agz an- ana anb ang ann anr anz ar- ara arb arg arn arr arz az- aza azb azg azn azz baa bab bag ban bar baz bba bbb bbg bbn bbr bga bgb bgg bgn bgr bgz bna bnb bng bnn bnr bnz bra brb brg brn brr brz bza bzn bzr bzz gaa gab gag gan gar gaz gba gbg gbn gbr gbz gga ggb ggg ggn ggr ggz gna gnb gnn gnr gra grb grg grn grr gza gzr naa nab nag nan nar naz nba nbb nbg nbn nbr nga ngb ngg ngn nna nnb nng nnn nnz nra nrb nrg nrn nrr nrz nzb nzg nzz ra- raa rab rag ran rar raz rba rbb rbg rbn rbr rga rgb rgg rgn rgr rna rnb rng rnn rnr rnz rra rrb rrg rrn rrr rza rzb z-g zaa zab zag zan zar zaz zbb zbr zgb zgg znn zzr zzz