a-a a-b aaa aab aae aak aao aau aav ab- aba abb abe abk abo abu abv aea aeb aee aek aeo aeu aev aka akb ake akk ako aku akv aoa aob aoe aok aoo aou aov au- aua aub aue auk auo auv av- ava avb ave avk avo avu b-u baa bab bae bak bao bau bav bba bbb bbe bbk bbo bbu be- bea beb bee bek beo beu bev bka bkb bke bkk bko bkv boa bob boe bok boo bou bov bua bub bue buk buo buu bva bvb bve bvk bvo bvu bvv eaa eab eae eak eao eau eav eba ebb ebe ebk ebo ebu ebv eea eeb eee eek eeo eev eka ekb eke eko eku ekv eo- eoa eob eoe eok eoo eou eu- eua eub eue euv eva evb eve evo evv ka- kaa kab kae kak kao kau kav kba kbb kbe kbk kbo kbu ke- kea keb kee kek keo kev kkb kke kkk kku kkv koa kob koe kok koo kou kub kue kuk kuu kva kvb kvk kvo kvv oaa oab oae oak oao oau oav ob- oba obb obe obk obo obu obv oea oeb oee oeo oka okb oke okk oko oku oo- ooa oob ook ooo oov ou- oua oue ouk ouo ov- ova ovb ove ovo ovv ua- uaa uab uae uak uao uau uav uba ubb ube ubk ubo ubu ubv uea ueb uee uka ukb uke ukk uku uoa uob uoe uok uoo uua uue uuu uva uvb uve uvo uvu uvv v-a v-e vaa vab vae vak vao vau vav vba vbk vbo vbv vea veb vee vek veo veu vka vkb voa vob voe vok voo vou vov vue vuk vuv vva vvb vvo vvv