a-a a-b aaa aab aaj aak aan aao aav ab- aba abb abj abk abn abo abv aja ajb ajj ajk ajn ajo aka akb akj akk akn ako akv an- ana anb anj ank ann ano anv aoa aob aoj aok aon aoo aov av- ava avb avk avn avo baa bab baj bak ban bao bav bba bbb bbk bbn bbo bja bjj bjk bjn bka bkb bkk bkn bko bkv bna bnb bnj bnk bnn bno bnv boa bob boj bok bon boo bov bva bvb bvk bvn bvo bvv jaa jab jaj jak jan jao jav jba jbj jbk jbo jja jjb jjj jjk jka jkb jkk jkn jko jkv jna jnj jnn jno joa job joj jok jon joo jvb jvn ka- kaa kab kaj kak kan kao kav kba kbb kbk kbn kbo kjb kkb kkk kkn kkv kn- kna knk knn kno koa kob kok kon koo kva kvb kvk kvn kvo kvv naa nab naj nak nan nao nav nba nbb nbk nbn nbo nbv nja njk njn nka nkj nkk nkn nko nna nnb nnk nnn nno nnv no- noa nob noj nok non noo nov nva nvb nvk nvn nvv oaa oab oaj oak oan oao oav ob- oba obb obj obk obn obo obv oja ojb ojo oka okb okj okk oko on- ona onb onj onk onn ono oo- ooa oob ook oon ooo oov ov- ova ovb ovo ovv v-a vaa vab vaj vak van vao vav vba vbk vbo vbv vja vka vkb vn- vna vnj vno vnv voa vob vok von voo vov vva vvb vvo vvv