-er -ey a-a a-b aaa aab aad aae aao aar aay ab- aba abb abd abe abo abr aby ad- ada adb add ade ado adr ady aea aeb aed aee aeo aer aey aoa aob aod aoe aoo aor ar- ara arb ard are aro arr ary ay- aya ayd aye ayo ayr baa bab bad bae bao bar bay bba bbb bbd bbe bbo bbr bby bda bdb bdd bde bdo bdr bdy be- bea beb bed bee beo ber bey boa bob bod boe boo bor boy bra brb brd bre bro brr bry by- bya byd bye byo byr daa dab dad dae dao dar day dba dbb dbd dbe dbo dbr dby dda ddb ddd dde ddo ddr ddy de- dea deb ded dee deo der dey doa dob dod doe doo dor doy dra drb drd dre dro drr dry dy- dya dyb dyd dye dyo dyr dyy eaa eab ead eae eao ear eba ebb ebd ebe ebo ebr eby ed- eda edb edd ede edo edr edy eea eeb eed eee eeo eer eey eo- eoa eob eod eoe eoo eor era erb erd ere ero err ery eya eyd eye eyo eyr oaa oab oad oae oao oar ob- oba obb obd obe obo obr oby oda odb odd ode odo odr oea oeb oed oee oeo oer oey oo- ooa oob ood ooo oor or- ora orb ord ore oro orr ory oya oyd oye oyo ra- raa rab rad rae rao rar ray rba rbb rbd rbe rbo rbr rda rdb rdd rde rdo rdr rdy re- rea reb red ree reo rer rey roa rob rod roe roo ror roy rra rrb rrd rrr ry- rya ryd rye ryo ryr ryy yaa yab yad yae yao yar yay ybe ybr yby yda yde ydo ydy yea yeb yed yee yeo yer yey yob yod yoe yoo yor yoy yra yre yro yyb yye yyy