-ey a-a a-b aaa aab aae aak aan aao aav aay ab- aba abb abe abk abn abo abv aby aea aeb aee aek aen aeo aev aey aka akb ake akk akn ako akv an- ana anb ane ank ann ano anv any aoa aob aoe aok aon aoo aov av- ava avb ave avk avn avo avy ay- aya aye ayk ayn ayo baa bab bae bak ban bao bav bay bba bbb bbe bbk bbn bbo bby be- bea beb bee bek ben beo bev bey bka bkb bke bkk bkn bko bkv bna bnb bne bnk bnn bno bnv boa bob boe bok bon boo bov boy bva bvb bve bvk bvn bvo bvv by- bya bye byk byn byo eaa eab eae eak ean eao eav eba ebb ebe ebk ebn ebo ebv eby eea eeb eee eek een eeo eev eey eka ekb eke eko ekv eky en- ena enb ene enk enn eno env eny eo- eoa eob eoe eok eon eoo eva evb eve evn evo evv evy eya eye eyn eyo ka- kaa kab kae kak kan kao kav kay kba kbb kbe kbk kbn kbo ke- kea keb kee kek ken keo kev key kkb kke kkk kkn kkv kky kn- kna kne knk knn kno koa kob koe kok kon koo koy kva kvb kvk kvn kvo kvv kya kye kyn kyo naa nab nae nak nan nao nav nay nba nbb nbe nbk nbn nbo nbv ne- nea neb nee nek nen neo nev ney nka nke nkk nkn nko nky nna nnb nne nnk nnn nno nnv no- noa nob noe nok non noo nov noy nva nvb nve nvk nvn nvv nya nye nyk nyn nyo nyy oaa oab oae oak oan oao oav ob- oba obb obe obk obn obo obv oby oea oeb oee oen oeo oey oka okb oke okk oko on- ona onb one onk onn ono ony oo- ooa oob ook oon ooo oov ov- ova ovb ove ovo ovv oya oye oyo v-a v-e vaa vab vae vak van vao vav vay vba vbk vbo vbv vea veb vee vek ven veo vey vka vkb vn- vna vno vnv voa vob voe vok von voo vov voy vva vvb vvo vvv vye vyn yaa yab yae yak yan yao yav yay ybe yby yea yeb yee yek yen yeo yev yey yka ykk ykn yna yne ynk ynn yny yob yoe yok yon yoo yoy yva yve yvo yvy yyb yye yyy