a-a a-b a-z aaa aab aad aah aao aar aaz ab- aba abb abd abh abo abr abz ad- ada adb add adh ado adr adz aha ahb ahd ahh aho ahr ahz aoa aob aod aoh aoo aor ar- ara arb ard arh aro arr arz az- aza azb azd azo azz baa bab bad bah bao bar baz bba bbb bbd bbh bbo bbr bda bdb bdd bdh bdo bdr bdz bha bhb bhd bhh bho bhr boa bob bod boh boo bor boz bra brb brd brh bro brr brz bza bzd bzh bzo bzr bzz daa dab dad dah dao dar daz dba dbb dbd dbh dbo dbr dbz dda ddb ddd ddh ddo ddr ddz dh- dha dhb dhd dhh dho dhr doa dob dod doh doo dor doz dra drb drd dro drr drz dza dzb dzd dzo dzr haa hab had hah hao har haz hba hbb hbd hbh hbo hbr hbz hda hdb hdd hdh hdo hdr hdz hha hhb hhd hhh hho hhr hhz hoa hob hod hoh hoo hor hr- hra hrb hrd hrh hro hrr hrz hzd hzo oaa oab oad oah oao oar ob- oba obb obd obh obo obr oda odb odd odh odo odr oha ohd ohh oho ohr oo- ooa oob ood ooh ooo oor or- ora orb ord orh oro orr orz oza ozo ozz ra- raa rab rad rah rao rar raz rba rbb rbd rbh rbo rbr rda rdb rdd rdh rdo rdr rh- rha rhb rhd rhh rho rhr roa rob rod roh roo ror roz rra rrb rrd rrh rrr rza rzb rzo zaa zab zad zah zao zar zaz zbb zbr zha zho zhr zo- zoa zob zod zoo zor zrh zro zzr zzz