a-a a-b a-z aaa aab aag aah aan aaz ab- aba abb abg abh abn abz ag- aga agb agg agh agn agz aha ahb ahg ahh ahn ahz an- ana anb ang anh ann anz az- aza azb azg azn azz baa bab bag bah ban baz bba bbb bbg bbh bbn bga bgb bgg bgh bgn bgz bha bhb bhg bhh bna bnb bng bnn bnz bza bzh bzn bzz gaa gab gag gah gan gaz gba gbg gbh gbn gbz gga ggb ggg ggh ggn ggz gha ghb ghg ghh ghn ghz gna gnb gnn gza haa hab hag hah han haz hba hbb hbg hbh hbn hbz hga hgb hgg hgh hgn hha hhb hhg hhh hhn hhz hna hnb hng hnh hnn hnz naa nab nag nah nan naz nba nbb nbg nbn nga ngb ngg ngh ngn nha nhb nhg nhh nhn nhz nna nnb nng nnh nnn nnz nzb nzg nzz z-g zaa zab zag zah zan zaz zbb zgb zgg zha znn zzz