-er bbb bbd bbe bbn bbo bbr bdb bdd bde bdo bdr bdz be- beb bed bee ben beo ber bez bnb bnd bne bnn bno bnr bnz bob bod boe bon boo bor boz brb brd bre brn bro brr brz bzd bze bzn bzo bzr bzz dbb dbd dbe dbn dbo dbr dbz ddb ddd dde ddn ddo ddr ddz de- deb ded dee den deo der dez dnb dnd dne dnn dno dnr dnz dob dod doe don doo dor doz drb drd dre drn dro drr drz dzb dzd dze dzo dzr ebb ebd ebe ebn ebo ebr ed- edb edd ede edn edo edr eeb eed eee een eeo eer en- enb end ene enn eno enr enz eo- eob eod eoe eon eoo eor erb erd ere ern ero err erz eze ezo ezr ezz nbb nbd nbe nbn nbo nbr ndb ndd nde ndn ndo ndr ne- neb ned nee nen neo ner nez nnb nne nnn nno nnz no- nob nod noe non noo nor noz nrb nrd nre nrn nro nrr nrz nzb nzd nze nzo nzz ob- obb obd obe obn obo obr odb odd ode odn odo odr oeb oed oee oen oeo oer on- onb ond one onn ono onr oo- oob ood oon ooo oor or- orb ord ore orn oro orr orz oze ozo ozz rbb rbd rbe rbn rbo rbr rdb rdd rde rdn rdo rdr re- reb red ree ren reo rer rez rnb rnd rnn rno rnr rnz rob rod roe ron roo ror roz rrb rrd rrn rrr rzb rze rzo zbb zbr zeb zed zee zen zeo zer zez znd zne znn zno zo- zob zod zoe zon zoo zor zro zzr zzz