-er -ey bbb bbd bbe bbk bbn bbo bbr bby bdb bdd bde bdk bdo bdr bdy be- beb bed bee bek ben beo ber bey bkb bke bkk bkn bko bkr bnb bnd bne bnk bnn bno bnr bob bod boe bok bon boo bor boy brb brd bre brk brn bro brr bry by- byd bye byk byn byo byr dbb dbd dbe dbk dbn dbo dbr dby ddb ddd dde ddk ddn ddo ddr ddy de- deb ded dee dek den deo der dey dkb dke dkk dko dkr dnb dnd dne dnk dnn dno dnr dny dob dod doe dok don doo dor doy drb drd dre drk drn dro drr dry dy- dyb dyd dye dyk dyn dyo dyr dyy ebb ebd ebe ebk ebn ebo ebr eby ed- edb edd ede edk edn edo edr edy eeb eed eee eek een eeo eer eey ekb ekd eke eko ekr eky en- enb end ene enk enn eno enr eny eo- eob eod eoe eok eon eoo eor erb erd ere erk ern ero err ery eyd eye eyn eyo eyr kbb kbd kbe kbk kbn kbo kbr kdb kde kdk kdo kdr kdy ke- keb ked kee kek ken keo ker key kkb kke kkk kkn kkr kky kn- knd kne knk knn kno knr kob kod koe kok kon koo kor koy krd krk krn kro krr kry kyd kye kyn kyo kyr nbb nbd nbe nbk nbn nbo nbr ndb ndd nde ndk ndn ndo ndr ndy ne- neb ned nee nek nen neo ner ney nke nkk nkn nko nkr nky nnb nne nnk nnn nno no- nob nod noe nok non noo nor noy nrb nrd nre nrk nrn nro nrr nry nyd nye nyk nyn nyo nyy ob- obb obd obe obk obn obo obr oby odb odd ode odn odo odr oeb oed oee oen oeo oer oey okb okd oke okk oko okr on- onb ond one onk onn ono onr ony oo- oob ood ook oon ooo oor or- orb ord ore ork orn oro orr ory oyd oye oyo rbb rbd rbe rbk rbn rbo rbr rdb rdd rde rdn rdo rdr rdy re- reb red ree rek ren reo rer rey rkb rke rkk rko rky rnb rnd rnn rno rnr rny rob rod roe rok ron roo ror roy rrb rrd rrk rrn rrr ry- ryd rye ryk ryn ryo ryr ryy ybe ybr yby yde ydn ydo ydy yeb yed yee yek yen yeo yer yey ykk ykn ynd yne ynk ynn yny yob yod yoe yok yon yoo yor yoy yre yrn yro yyb yye yyy