-ey a-a a-b a-t aaa aab aae aan aao aat aay ab- aba abb abe abn abo abt aby aea aeb aee aen aeo aet aey an- ana anb ane ann ano ant any aoa aob aoe aon aoo aot at- ata atb ate atn ato att ay- aya aye ayn ayo ayt baa bab bae ban bao bat bay bba bbb bbe bbn bbo bbt bby be- bea beb bee ben beo bet bey bna bnb bne bnn bno bnt boa bob boe bon boo bot boy bta btb bte btn bto btt bty by- bya bye byn byo byt eaa eab eae ean eao eat eba ebb ebe ebn ebo ebt eby eea eeb eee een eeo eet eey en- ena enb ene enn eno ent eny eo- eoa eob eoe eon eoo eot eta etb ete etn eto ett ety eya eye eyn eyo eyt naa nab nae nan nao nat nay nba nbb nbe nbn nbo nbt ne- nea neb nee nen neo net ney nna nnb nne nnn nno nnt no- noa nob noe non noo not noy nta ntb nte ntn nto ntt nya nye nyn nyo nyt nyy oaa oab oae oan oao oat ob- oba obb obe obn obo obt oby oea oeb oee oen oeo oet oey on- ona onb one onn ono ont ony oo- ooa oob oon ooo oot ot- ota otb ote otn oto ott oya oye oyo taa tab tae tan tao tat tay tba tbb tbe tbn tbo tbt te- tea teb tee ten teo tet tey tna tnb tne tnn tno tnt to- toa tob toe ton too tot toy tta ttb tte ttn tto ttt tty tya tye tyn tyo tyt yaa yab yae yan yao yat yay ybe yby yea yeb yee yen yeo yet yey yna yne ynn yny yob yoe yon yoo yot yoy yta yte ytn yto ytt yyb yye yyt yyy