-ey a-a a-b aaa aab aae aak aao aav aay ab- aba abb abe abk abo abv aby aea aeb aee aek aeo aev aey aka akb ake akk ako akv aoa aob aoe aok aoo aov av- ava avb ave avk avo avy ay- aya aye ayk ayo baa bab bae bak bao bav bay bba bbb bbe bbk bbo bby be- bea beb bee bek beo bev bey bka bkb bke bkk bko bkv boa bob boe bok boo bov boy bva bvb bve bvk bvo bvv by- bya bye byk byo eaa eab eae eak eao eav eba ebb ebe ebk ebo ebv eby eea eeb eee eek eeo eev eey eka ekb eke eko ekv eky eo- eoa eob eoe eok eoo eva evb eve evo evv evy eya eye eyo ka- kaa kab kae kak kao kav kay kba kbb kbe kbk kbo ke- kea keb kee kek keo kev key kkb kke kkk kkv kky koa kob koe kok koo koy kva kvb kvk kvo kvv kya kye kyo oaa oab oae oak oao oav ob- oba obb obe obk obo obv oby oea oeb oee oeo oey oka okb oke okk oko oo- ooa oob ook ooo oov ov- ova ovb ove ovo ovv oya oye oyo v-a v-e vaa vab vae vak vao vav vay vba vbk vbo vbv vea veb vee vek veo vey vka vkb voa vob voe vok voo vov voy vva vvb vvo vvv vye yaa yab yae yak yao yav yay ybe yby yea yeb yee yek yeo yev yey yka ykk yob yoe yok yoo yoy yva yve yvo yvy yyb yye yyy