-ey a-a a-b aaa aab aad aae aan aao aay ab- aba abb abd abe abn abo aby ad- ada adb add ade adn ado ady aea aeb aed aee aen aeo aey an- ana anb and ane ann ano any aoa aob aod aoe aon aoo ay- aya ayd aye ayn ayo baa bab bad bae ban bao bay bba bbb bbd bbe bbn bbo bby bda bdb bdd bde bdo bdy be- bea beb bed bee ben beo bey bna bnb bnd bne bnn bno boa bob bod boe bon boo boy by- bya byd bye byn byo daa dab dad dae dan dao day dba dbb dbd dbe dbn dbo dby dda ddb ddd dde ddn ddo ddy de- dea deb ded dee den deo dey dna dnb dnd dne dnn dno dny doa dob dod doe don doo doy dy- dya dyb dyd dye dyn dyo dyy eaa eab ead eae ean eao eba ebb ebd ebe ebn ebo eby ed- eda edb edd ede edn edo edy eea eeb eed eee een eeo eey en- ena enb end ene enn eno eny eo- eoa eob eod eoe eon eoo eya eyd eye eyn eyo naa nab nad nae nan nao nay nba nbb nbd nbe nbn nbo nda ndb ndd nde ndn ndo ndy ne- nea neb ned nee nen neo ney nna nnb nne nnn nno no- noa nob nod noe non noo noy nya nyd nye nyn nyo nyy oaa oab oad oae oan oao ob- oba obb obd obe obn obo oby oda odb odd ode odn odo oea oeb oed oee oen oeo oey on- ona onb ond one onn ono ony oo- ooa oob ood oon ooo oya oyd oye oyo yaa yab yad yae yan yao yay ybe yby yda yde ydn ydo ydy yea yeb yed yee yen yeo yey yna ynd yne ynn yny yob yod yoe yon yoo yoy yyb yye yyy