-er -ol bbb bbd bbe bbl bbn bbo bbr bdb bdd bde bdl bdo bdr be- beb bed bee bel ben beo ber blb bld ble bll bln blo blr bnb bnd bne bnl bnn bno bnr bob bod boe bol bon boo bor brb brd bre brl brn bro brr dbb dbd dbe dbl dbn dbo dbr ddb ddd dde ddl ddn ddo ddr de- deb ded dee del den deo der dl- dlb dld dle dll dlo dlr dnb dnd dne dnl dnn dno dnr dob dod doe dol don doo dor drb drd dre drl drn dro drr ebb ebd ebe ebl ebn ebo ebr ed- edb edd ede edl edn edo edr eeb eed eee eel een eeo eer elb eld ele ell eln elo elr en- enb end ene enl enn eno enr eo- eob eod eoe eol eon eoo eor erb erd ere erl ern ero err lbb lbd lbe lbl lbo lbr ldb ldd lde ldl ldn ldo ldr leb led lee lel len leo ler llb lld lle lll lln llo llr lnb lnd lne lnl lnn lno lnr lob lod loe lol lon loo lor lrb lrd lrn lro lrr nbb nbd nbe nbl nbn nbo nbr ndb ndd nde ndl ndn ndo ndr ne- neb ned nee nel nen neo ner nlb nld nle nll nln nlo nlr nnb nne nnl nnn nno no- nob nod noe nol non noo nor nrb nrd nre nrl nrn nro nrr ob- obb obd obe obl obn obo obr odb odd ode odl odn odo odr oeb oed oee oel oen oeo oer olb old ole oll oln olo on- onb ond one onl onn ono onr oo- oob ood ool oon ooo oor or- orb ord ore orl orn oro orr rbb rbd rbe rbl rbn rbo rbr rdb rdd rde rdl rdn rdo rdr re- reb red ree rel ren reo rer rld rle rll rln rlo rlr rnb rnd rnn rno rnr rob rod roe rol ron roo ror rrb rrd rrl rrn rrr