-ey a-a a-b aaa aab aae aag aan aao aay ab- aba abb abe abg abn abo aby aea aeb aee aeg aen aeo aey ag- aga agb age agg agn ago agy an- ana anb ane ang ann ano any aoa aob aoe aog aon aoo ay- aya aye ayn ayo baa bab bae bag ban bao bay bba bbb bbe bbg bbn bbo bby be- bea beb bee beg ben beo bey bga bgb bge bgg bgn bgo bna bnb bne bng bnn bno boa bob boe bog bon boo boy by- bya bye byg byn byo eaa eab eae eag ean eao eba ebb ebe ebg ebn ebo eby eea eeb eee eeg een eeo eey ega egb ege egg egn ego egy en- ena enb ene eng enn eno eny eo- eoa eob eoe eog eon eoo eya eye eyn eyo gaa gab gae gag gan gao gay gba gbe gbg gbn gbo gby ge- gea geb gee geg gen geo gey gga ggb ggg ggn ggo gna gnb gne gnn gno goa gob goe gog gon goo goy gy- gya gyb gye gyn gyo naa nab nae nag nan nao nay nba nbb nbe nbg nbn nbo ne- nea neb nee neg nen neo ney nga ngb nge ngg ngn ngo nna nnb nne nng nnn nno no- noa nob noe nog non noo noy nya nye nyg nyn nyo nyy oaa oab oae oag oan oao ob- oba obb obe obg obn obo oby oea oeb oee oeg oen oeo oey oga oge ogg ogn ogo ogy on- ona onb one ong onn ono ony oo- ooa oob oog oon ooo oya oye oyo yaa yab yae yag yan yao yay ybe ybg yby yea yeb yee yeg yen yeo yey yga ygo yna yne yng ynn yny yob yoe yog yon yoo yoy yyb yye yyg yyy