-er -ey a-a a-b aaa aab aad aae aak aao aar aay ab- aba abb abd abe abk abo abr aby ad- ada adb add ade adk ado adr ady aea aeb aed aee aek aeo aer aey aka akb akd ake akk ako akr aoa aob aod aoe aok aoo aor ar- ara arb ard are ark aro arr ary ay- aya ayd aye ayk ayo ayr baa bab bad bae bak bao bar bay bba bbb bbd bbe bbk bbo bbr bby bda bdb bdd bde bdk bdo bdr bdy be- bea beb bed bee bek beo ber bey bka bkb bke bkk bko bkr boa bob bod boe bok boo bor boy bra brb brd bre brk bro brr bry by- bya byd bye byk byo byr daa dab dad dae dak dao dar day dba dbb dbd dbe dbk dbo dbr dby dda ddb ddd dde ddk ddo ddr ddy de- dea deb ded dee dek deo der dey dka dkb dke dkk dko dkr doa dob dod doe dok doo dor doy dra drb drd dre drk dro drr dry dy- dya dyb dyd dye dyk dyo dyr dyy eaa eab ead eae eak eao ear eba ebb ebd ebe ebk ebo ebr eby ed- eda edb edd ede edk edo edr edy eea eeb eed eee eek eeo eer eey eka ekb ekd eke eko ekr eky eo- eoa eob eod eoe eok eoo eor era erb erd ere erk ero err ery eya eyd eye eyo eyr ka- kaa kab kad kae kak kao kar kay kba kbb kbd kbe kbk kbo kbr kda kdb kde kdk kdo kdr kdy ke- kea keb ked kee kek keo ker key kkb kke kkk kkr kky koa kob kod koe kok koo kor koy kra krd krk kro krr kry kya kyd kye kyo kyr oaa oab oad oae oak oao oar ob- oba obb obd obe obk obo obr oby oda odb odd ode odo odr oea oeb oed oee oeo oer oey oka okb okd oke okk oko okr oo- ooa oob ood ook ooo oor or- ora orb ord ore ork oro orr ory oya oyd oye oyo ra- raa rab rad rae rak rao rar ray rba rbb rbd rbe rbk rbo rbr rda rdb rdd rde rdo rdr rdy re- rea reb red ree rek reo rer rey rkb rke rkk rko rky roa rob rod roe rok roo ror roy rra rrb rrd rrk rrr ry- rya ryd rye ryk ryo ryr ryy yaa yab yad yae yak yao yar yay ybe ybr yby yda yde ydo ydy yea yeb yed yee yek yeo yer yey yka ykk yob yod yoe yok yoo yor yoy yra yre yro yyb yye yyy