-ey a-a a-b aaa aab aae aag aak aao aay ab- aba abb abe abg abk abo aby aea aeb aee aeg aek aeo aey ag- aga agb age agg agk ago agy aka akb ake akg akk ako aoa aob aoe aog aok aoo ay- aya aye ayk ayo baa bab bae bag bak bao bay bba bbb bbe bbg bbk bbo bby be- bea beb bee beg bek beo bey bga bgb bge bgg bgk bgo bka bkb bke bkg bkk bko boa bob boe bog bok boo boy by- bya bye byg byk byo eaa eab eae eag eak eao eba ebb ebe ebg ebk ebo eby eea eeb eee eeg eek eeo eey ega egb ege egg ego egy eka ekb eke ekg eko eky eo- eoa eob eoe eog eok eoo eya eye eyo gaa gab gae gag gak gao gay gba gbe gbg gbk gbo gby ge- gea geb gee geg gek geo gey gga ggb ggg ggo gka gkb gko goa gob goe gog gok goo goy gy- gya gyb gye gyo ka- kaa kab kae kag kak kao kay kba kbb kbe kbk kbo ke- kea keb kee keg kek keo key kga kgb kgo kgy kkb kke kkk kky koa kob koe kog kok koo koy kya kye kyo oaa oab oae oag oak oao ob- oba obb obe obg obk obo oby oea oeb oee oeg oeo oey oga oge ogg ogo ogy oka okb oke okg okk oko oo- ooa oob oog ook ooo oya oye oyo yaa yab yae yag yak yao yay ybe ybg yby yea yeb yee yeg yek yeo yey yga ygo yka ykk yob yoe yog yok yoo yoy yyb yye yyg yyy