a-a a-b a-z aaa aab aah aao aar aav aaz ab- aba abb abh abo abr abv abz aha ahb ahh aho ahr ahv ahz aoa aob aoh aoo aor aov ar- ara arb arh aro arr arv arz av- ava avb avh avo avr avz az- aza azb azo azz baa bab bah bao bar bav baz bba bbb bbh bbo bbr bha bhb bhh bho bhr bhv boa bob boh boo bor bov boz bra brb brh bro brr brv brz bva bvb bvh bvo bvr bvv bza bzh bzo bzr bzz haa hab hah hao har hav haz hba hbb hbh hbo hbr hbv hbz hha hhb hhh hho hhr hhv hhz hoa hob hoh hoo hor hov hr- hra hrb hrh hro hrr hrv hrz hv- hva hvb hvo hvr hvv hzo oaa oab oah oao oar oav ob- oba obb obh obo obr obv oha ohh oho ohr oo- ooa oob ooh ooo oor oov or- ora orb orh oro orr orv orz ov- ova ovb ovh ovo ovv oza ozo ozz ra- raa rab rah rao rar rav raz rba rbb rbh rbo rbr rh- rha rhb rhh rho rhr rhv roa rob roh roo ror rov roz rra rrb rrh rrr rva rvb rvh rvo rvr rvv rza rzb rzo v-a vaa vab vah vao var vav vaz vba vbh vbo vbr vbv vbz vh- vha vhb vho voa vob voh voo vor vov voz vra vrb vrh vrr vva vvb vvo vvr vvv vvz zaa zab zah zao zar zav zaz zbb zbr zbv zha zho zhr zo- zoa zob zoo zor zrh zro zzr zzz