a-a a-b aaa aab aah aak aan aao aav ab- aba abb abh abk abn abo abv aha ahb ahh ahk ahn aho ahv aka akb akh akk akn ako akv an- ana anb anh ank ann ano anv aoa aob aoh aok aon aoo aov av- ava avb avh avk avn avo baa bab bah bak ban bao bav bba bbb bbh bbk bbn bbo bha bhb bhh bhk bho bhv bka bkb bkk bkn bko bkv bna bnb bnk bnn bno bnv boa bob boh bok bon boo bov bva bvb bvh bvk bvn bvo bvv haa hab hah hak han hao hav hba hbb hbh hbk hbn hbo hbv hha hhb hhh hhk hhn hho hhv hka hkb hkh hkk hkn hko hna hnb hnh hnk hnn hno hnv hoa hob hoh hok hon hoo hov hv- hva hvb hvk hvn hvo hvv ka- kaa kab kah kak kan kao kav kba kbb kbh kbk kbn kbo kha khh khk khn kho khv kkb kkh kkk kkn kkv kn- kna knk knn kno koa kob koh kok kon koo kva kvb kvh kvk kvn kvo kvv naa nab nah nak nan nao nav nba nbb nbk nbn nbo nbv nha nhb nhh nhk nhn nhv nka nkk nkn nko nna nnb nnh nnk nnn nno nnv no- noa nob noh nok non noo nov nva nvb nvh nvk nvn nvv oaa oab oah oak oan oao oav ob- oba obb obh obk obn obo obv oha ohh ohn oho oka okb okk oko on- ona onb onh onk onn ono oo- ooa oob ooh ook oon ooo oov ov- ova ovb ovh ovo ovv v-a vaa vab vah vak van vao vav vba vbh vbk vbo vbv vh- vha vhb vho vka vkb vn- vna vno vnv voa vob voh vok von voo vov vva vvb vvo vvv