a-a a-b a-z aaa aab aag aah aao aas aaz ab- aba abb abg abh abo abs abz ag- aga agb agg agh ago ags agz aha ahb ahg ahh aho ahs ahz aoa aob aog aoh aoo aos as- asa asb asg ash aso ass asz az- aza azb azg azo azs azz baa bab bag bah bao bas baz bba bbb bbg bbh bbo bbs bga bgb bgg bgh bgo bgs bgz bha bhb bhg bhh bho bhs boa bob bog boh boo bos boz bsa bsb bsg bsh bso bss bza bzh bzo bzs bzz gaa gab gag gah gao gas gaz gba gbg gbh gbo gbs gbz gga ggb ggg ggh ggo ggs ggz gha ghb ghg ghh gho ghs ghz goa gob gog goh goo gos goz gsa gsb gsg gso gss gza gzo haa hab hag hah hao has haz hba hbb hbg hbh hbo hbs hbz hga hgb hgg hgh hgo hgs hha hhb hhg hhh hho hhs hhz hoa hob hog hoh hoo hos hsa hsb hsg hsh hss hsz hzo hzs oaa oab oag oah oao oas ob- oba obb obg obh obo obs oga ogg ogh ogo ogs oha ohg ohh oho ohs oo- ooa oob oog ooh ooo oos os- osa osb osg osh oso oss oza ozo ozs ozz saa sab sag sah sao sas saz sba sbb sbg sbh sbo sbs sga sgb sgg sgh sgo sgs sh- sha shb shg shh sho shs soa sob sog soh soo sos soz ss- ssa ssb ssg ssh sso sss ssz sza z-g zaa zab zag zah zao zas zaz zbb zbs zgb zgg zgs zha zho zhs zo- zoa zob zog zoo zos zsa zsg zsh zsz zzs zzz