-ey a-a a-b aaa aab aae aak aao aau aay ab- aba abb abe abk abo abu aby aea aeb aee aek aeo aeu aey aka akb ake akk ako aku aoa aob aoe aok aoo aou au- aua aub aue auk auo ay- aya aye ayk ayo ayu b-u baa bab bae bak bao bau bay bba bbb bbe bbk bbo bbu bby be- bea beb bee bek beo beu bey bka bkb bke bkk bko boa bob boe bok boo bou boy bua bub bue buk buo buu buy by- bya bye byk byo byu eaa eab eae eak eao eau eba ebb ebe ebk ebo ebu eby eea eeb eee eek eeo eey eka ekb eke eko eku eky eo- eoa eob eoe eok eoo eou eu- eua eub eue eya eye eyo ka- kaa kab kae kak kao kau kay kba kbb kbe kbk kbo kbu ke- kea keb kee kek keo key kkb kke kkk kku kky koa kob koe kok koo kou koy kub kue kuk kuu kuy kya kye kyo kyu oaa oab oae oak oao oau ob- oba obb obe obk obo obu oby oea oeb oee oeo oey oka okb oke okk oko oku oo- ooa oob ook ooo ou- oua oue ouk ouo oya oye oyo ua- uaa uab uae uak uao uau uay uba ubb ube ubk ubo ubu uby uea ueb uee uey uka ukb uke ukk uku uoa uob uoe uok uoo uua uue uuu uyo uyu yaa yab yae yak yao yau yay ybe yby yea yeb yee yek yeo yey yka ykk yob yoe yok yoo you yoy yua yue yuk yuo yuu yuy yyb yye yyu yyy