-ey a-a a-b aaa aab aae aak aau aay ab- aba abb abe abk abu aby aea aeb aee aek aeu aey aka akb ake akk aku au- aua aub aue auk ay- aya aye ayk ayu b-u baa bab bae bak bau bay bba bbb bbe bbk bbu bby be- bea beb bee bek beu bey bka bkb bke bkk bua bub bue buk buu buy by- bya bye byk byu eaa eab eae eak eau eba ebb ebe ebk ebu eby eea eeb eee eek eey eka ekb eke eku eky eu- eua eub eue eya eye ka- kaa kab kae kak kau kay kba kbb kbe kbk kbu ke- kea keb kee kek key kkb kke kkk kku kky kub kue kuk kuu kuy kya kye kyu ua- uaa uab uae uak uau uay uba ubb ube ubk ubu uby uea ueb uee uey uka ukb uke ukk uku uua uue uuu uyu yaa yab yae yak yau yay ybe yby yea yeb yee yek yey yka ykk yua yue yuk yuu yuy yyb yye yyu yyy