-ey a-a a-b aaa aab aae aau aav aax aay ab- aba abb abe abu abv abx aby aea aeb aee aeu aev aex aey au- aua aub aue auv aux av- ava avb ave avu avx avy ax- axa axe axv axx ay- aya aye ayu ayx b-u baa bab bae bau bav bax bay bba bbb bbe bbu bbx bby be- bea beb bee beu bev bex bey bua bub bue buu bux buy bva bvb bve bvu bvv bxb bxx by- bya bye byu eaa eab eae eau eav eax eba ebb ebe ebu ebv ebx eby eea eeb eee eev eex eey eu- eua eub eue euv eux eva evb eve evv evy ex- exa exe exu exx exy eya eye ua- uaa uab uae uau uav uay uba ubb ube ubu ubv ubx uby uea ueb uee uey uua uue uuu uva uvb uve uvu uvv uxb uxu uyu v-a v-e vaa vab vae vau vav vax vay vba vbv vea veb vee veu vex vey vue vuv vva vvb vvv vxa vxv vye xaa xau xav xbe xbx xee xeu xev xex xue xuv xxv xxx xxy xyy yaa yab yae yau yav yax yay ybe yby yea yeb yee yev yex yey yua yue yuu yuv yux yuy yva yve yvy yxa yxe yxy yyb yye yyu yyy