-ey a-a a-b a-t aaa aab aad aae aao aat aay ab- aba abb abd abe abo abt aby ad- ada adb add ade ado adt ady aea aeb aed aee aeo aet aey aoa aob aod aoe aoo aot at- ata atb atd ate ato att ay- aya ayd aye ayo ayt baa bab bad bae bao bat bay bba bbb bbd bbe bbo bbt bby bda bdb bdd bde bdo bdt bdy be- bea beb bed bee beo bet bey boa bob bod boe boo bot boy bta btb btd bte bto btt bty by- bya byd bye byo byt daa dab dad dae dao dat day dba dbb dbd dbe dbo dbt dby dda ddb ddd dde ddo ddt ddy de- dea deb ded dee deo det dey doa dob dod doe doo dot doy dta dtb dtd dte dto dtt dty dy- dya dyb dyd dye dyo dyy eaa eab ead eae eao eat eba ebb ebd ebe ebo ebt eby ed- eda edb edd ede edo edt edy eea eeb eed eee eeo eet eey eo- eoa eob eod eoe eoo eot eta etb etd ete eto ett ety eya eyd eye eyo eyt oaa oab oad oae oao oat ob- oba obb obd obe obo obt oby oda odb odd ode odo odt oea oeb oed oee oeo oet oey oo- ooa oob ood ooo oot ot- ota otb otd ote oto ott oya oyd oye oyo taa tab tad tae tao tat tay tba tbb tbd tbe tbo tbt tda tdb tdd tde tdo tdt tdy te- tea teb ted tee teo tet tey to- toa tob tod toe too tot toy tta ttb ttd tte tto ttt tty tya tyd tye tyo tyt yaa yab yad yae yao yat yay ybe yby yda yde ydo ydt ydy yea yeb yed yee yeo yet yey yob yod yoe yoo yot yoy yta ytd yte yto ytt yyb yye yyt yyy