-er -ey bbb bbd bbe bbk bbo bbr bby bdb bdd bde bdk bdo bdr bdy be- beb bed bee bek beo ber bey bkb bke bkk bko bkr bob bod boe bok boo bor boy brb brd bre brk bro brr bry by- byd bye byk byo byr dbb dbd dbe dbk dbo dbr dby ddb ddd dde ddk ddo ddr ddy de- deb ded dee dek deo der dey dkb dke dkk dko dkr dob dod doe dok doo dor doy drb drd dre drk dro drr dry dy- dyb dyd dye dyk dyo dyr dyy ebb ebd ebe ebk ebo ebr eby ed- edb edd ede edk edo edr edy eeb eed eee eek eeo eer eey ekb ekd eke eko ekr eky eo- eob eod eoe eok eoo eor erb erd ere erk ero err ery eyd eye eyo eyr kbb kbd kbe kbk kbo kbr kdb kde kdk kdo kdr kdy ke- keb ked kee kek keo ker key kkb kke kkk kkr kky kob kod koe kok koo kor koy krd krk kro krr kry kyd kye kyo kyr ob- obb obd obe obk obo obr oby odb odd ode odo odr oeb oed oee oeo oer oey okb okd oke okk oko okr oo- oob ood ook ooo oor or- orb ord ore ork oro orr ory oyd oye oyo rbb rbd rbe rbk rbo rbr rdb rdd rde rdo rdr rdy re- reb red ree rek reo rer rey rkb rke rkk rko rky rob rod roe rok roo ror roy rrb rrd rrk rrr ry- ryd rye ryk ryo ryr ryy ybe ybr yby yde ydo ydy yeb yed yee yek yeo yer yey ykk yob yod yoe yok yoo yor yoy yre yro yyb yye yyy