a-a a-b a-z aaa aab aad aah aao aas aaz ab- aba abb abd abh abo abs abz ad- ada adb add adh ado ads adz aha ahb ahd ahh aho ahs ahz aoa aob aod aoh aoo aos as- asa asb asd ash aso ass asz az- aza azb azd azo azs azz baa bab bad bah bao bas baz bba bbb bbd bbh bbo bbs bda bdb bdd bdh bdo bds bdz bha bhb bhd bhh bho bhs boa bob bod boh boo bos boz bsa bsb bsd bsh bso bss bza bzd bzh bzo bzs bzz daa dab dad dah dao das daz dba dbb dbd dbh dbo dbs dbz dda ddb ddd ddh ddo dds ddz dh- dha dhb dhd dhh dho dhs doa dob dod doh doo dos doz dsa dsb dsd dsh dso dss dsz dza dzb dzd dzo dzs haa hab had hah hao has haz hba hbb hbd hbh hbo hbs hbz hda hdb hdd hdh hdo hds hdz hha hhb hhd hhh hho hhs hhz hoa hob hod hoh hoo hos hsa hsb hsd hsh hss hsz hzd hzo hzs oaa oab oad oah oao oas ob- oba obb obd obh obo obs oda odb odd odh odo ods oha ohd ohh oho ohs oo- ooa oob ood ooh ooo oos os- osa osb osd osh oso oss oza ozo ozs ozz saa sab sad sah sao sas saz sba sbb sbd sbh sbo sbs sda sdb sdd sdh sdo sds sdz sh- sha shb shd shh sho shs soa sob sod soh soo sos soz ss- ssa ssb ssd ssh sso sss ssz sza szd zaa zab zad zah zao zas zaz zbb zbs zds zha zho zhs zo- zoa zob zod zoo zos zsa zsh zsz zzs zzz