a-a a-b a-z aaa aab aah aas aaz ab- aba abb abh abs abz aha ahb ahh ahs ahz as- asa asb ash ass asz az- aza azb azs azz baa bab bah bas baz bba bbb bbh bbs bha bhb bhh bhs bsa bsb bsh bss bza bzh bzs bzz haa hab hah has haz hba hbb hbh hbs hbz hha hhb hhh hhs hhz hsa hsb hsh hss hsz hzs saa sab sah sas saz sba sbb sbh sbs sh- sha shb shh shs ss- ssa ssb ssh sss ssz sza zaa zab zah zas zaz zbb zbs zha zhs zsa zsh zsz zzs zzz