a-a a-b a-z aaa aab aag aah aan aao aaz ab- aba abb abg abh abn abo abz ag- aga agb agg agh agn ago agz aha ahb ahg ahh ahn aho ahz an- ana anb ang anh ann ano anz aoa aob aog aoh aon aoo az- aza azb azg azn azo azz baa bab bag bah ban bao baz bba bbb bbg bbh bbn bbo bga bgb bgg bgh bgn bgo bgz bha bhb bhg bhh bho bna bnb bng bnn bno bnz boa bob bog boh bon boo boz bza bzh bzn bzo bzz gaa gab gag gah gan gao gaz gba gbg gbh gbn gbo gbz gga ggb ggg ggh ggn ggo ggz gha ghb ghg ghh ghn gho ghz gna gnb gnn gno goa gob gog goh gon goo goz gza gzo haa hab hag hah han hao haz hba hbb hbg hbh hbn hbo hbz hga hgb hgg hgh hgn hgo hha hhb hhg hhh hhn hho hhz hna hnb hng hnh hnn hno hnz hoa hob hog hoh hon hoo hzo naa nab nag nah nan nao naz nba nbb nbg nbn nbo nga ngb ngg ngh ngn ngo nha nhb nhg nhh nhn nhz nna nnb nng nnh nnn nno nnz no- noa nob nog noh non noo noz nzb nzg nzo nzz oaa oab oag oah oan oao ob- oba obb obg obh obn obo oga ogg ogh ogn ogo oha ohg ohh ohn oho on- ona onb ong onh onn ono oo- ooa oob oog ooh oon ooo oza ozo ozz z-g zaa zab zag zah zan zao zaz zbb zgb zgg zha zho znn zno zo- zoa zob zog zon zoo zzz