a-a a-b a-z aaa aab aah aan aao aav aaz ab- aba abb abh abn abo abv abz aha ahb ahh ahn aho ahv ahz an- ana anb anh ann ano anv anz aoa aob aoh aon aoo aov av- ava avb avh avn avo avz az- aza azb azn azo azz baa bab bah ban bao bav baz bba bbb bbh bbn bbo bha bhb bhh bho bhv bna bnb bnn bno bnv bnz boa bob boh bon boo bov boz bva bvb bvh bvn bvo bvv bza bzh bzn bzo bzz haa hab hah han hao hav haz hba hbb hbh hbn hbo hbv hbz hha hhb hhh hhn hho hhv hhz hna hnb hnh hnn hno hnv hnz hoa hob hoh hon hoo hov hv- hva hvb hvn hvo hvv hzo naa nab nah nan nao nav naz nba nbb nbn nbo nbv nha nhb nhh nhn nhv nhz nna nnb nnh nnn nno nnv nnz no- noa nob noh non noo nov noz nva nvb nvh nvn nvv nzb nzo nzz oaa oab oah oan oao oav ob- oba obb obh obn obo obv oha ohh ohn oho on- ona onb onh onn ono oo- ooa oob ooh oon ooo oov ov- ova ovb ovh ovo ovv oza ozo ozz v-a vaa vab vah van vao vav vaz vba vbh vbo vbv vbz vh- vha vhb vho vn- vna vno vnv voa vob voh von voo vov voz vva vvb vvo vvv vvz vzn zaa zab zah zan zao zav zaz zbb zbv zha zho znn zno zo- zoa zob zon zoo zzz