-ey a-a a-b aaa aab aae aao aav aay ab- aba abb abe abo abv aby aea aeb aee aeo aev aey aoa aob aoe aoo aov av- ava avb ave avo avy ay- aya aye ayo baa bab bae bao bav bay bba bbb bbe bbo bby be- bea beb bee beo bev bey boa bob boe boo bov boy bva bvb bve bvo bvv by- bya bye byo eaa eab eae eao eav eba ebb ebe ebo ebv eby eea eeb eee eeo eev eey eo- eoa eob eoe eoo eva evb eve evo evv evy eya eye eyo oaa oab oae oao oav ob- oba obb obe obo obv oby oea oeb oee oeo oey oo- ooa oob ooo oov ov- ova ovb ove ovo ovv oya oye oyo v-a v-e vaa vab vae vao vav vay vba vbo vbv vea veb vee veo vey voa vob voe voo vov voy vva vvb vvo vvv vye yaa yab yae yao yav yay ybe yby yea yeb yee yeo yev yey yob yoe yoo yoy yva yve yvo yvy yyb yye yyy