-ey a-a a-b aaa aab aae aak aan aay ab- aba abb abe abk abn aby aea aeb aee aek aen aey aka akb ake akk akn an- ana anb ane ank ann any ay- aya aye ayk ayn baa bab bae bak ban bay bba bbb bbe bbk bbn bby be- bea beb bee bek ben bey bka bkb bke bkk bkn bna bnb bne bnk bnn by- bya bye byk byn eaa eab eae eak ean eba ebb ebe ebk ebn eby eea eeb eee eek een eey eka ekb eke eky en- ena enb ene enk enn eny eya eye eyn ka- kaa kab kae kak kan kay kba kbb kbe kbk kbn ke- kea keb kee kek ken key kkb kke kkk kkn kky kn- kna kne knk knn kya kye kyn naa nab nae nak nan nay nba nbb nbe nbk nbn ne- nea neb nee nek nen ney nka nke nkk nkn nky nna nnb nne nnk nnn nya nye nyk nyn nyy yaa yab yae yak yan yay ybe yby yea yeb yee yek yen yey yka ykk ykn yna yne ynk ynn yny yyb yye yyy