-er b-p bbb bbd bbe bbn bbo bbp bbr bdb bdd bde bdo bdp bdr bdz be- beb bed bee ben beo bep ber bez bnb bnd bne bnn bno bnp bnr bnz bob bod boe bon boo bop bor boz bpb bpd bpe bpn bpo bpp bpr brb brd bre brn bro brp brr brz bzd bze bzn bzo bzp bzr bzz dbb dbd dbe dbn dbo dbp dbr dbz ddb ddd dde ddn ddo ddp ddr ddz de- deb ded dee den deo dep der dez dnb dnd dne dnn dno dnp dnr dnz dob dod doe don doo dop dor doz dpb dpd dpe dpn dpo dpp dpr dpz drb drd dre drn dro drp drr drz dzb dzd dze dzo dzp dzr ebb ebd ebe ebn ebo ebp ebr ed- edb edd ede edn edo edp edr eeb eed eee een eeo eep eer en- enb end ene enn eno enp enr enz eo- eob eod eoe eon eoo eop eor ep- epb epd epe epn epo epp epr epz erb erd ere ern ero erp err erz eze ezo ezr ezz nbb nbd nbe nbn nbo nbp nbr ndb ndd nde ndn ndo ndp ndr ne- neb ned nee nen neo nep ner nez nnb nne nnn nno nnp nnz no- nob nod noe non noo nop nor noz npb npd npe npn npo npp npr npz nrb nrd nre nrn nro nrp nrr nrz nzb nzd nze nzo nzp nzz ob- obb obd obe obn obo obp obr odb odd ode odn odo odp odr oeb oed oee oen oeo oep oer on- onb ond one onn ono onp onr oo- oob ood oon ooo oop oor op- opb opd ope opn opo opp opr or- orb ord ore orn oro orp orr orz oze ozo ozz p-p pbb pbd pbe pbn pbo pbp pbr pbz pdb pdd pde pdn pdo pdp pdr pdz peb ped pee pen peo pep per pez pn- pnb pnd pne pnn pno pnp pnr pob pod poe pon poo pop por poz ppb ppd ppe ppn ppo ppp ppr ppz prb prd pre prn pro prp prr prz pzp rbb rbd rbe rbn rbo rbp rbr rdb rdd rde rdn rdo rdp rdr re- reb red ree ren reo rep rer rez rnb rnd rnn rno rnp rnr rnz rob rod roe ron roo rop ror roz rpb rpd rpe rpn rpo rpp rpr rpz rrb rrd rrn rrp rrr rzb rze rzo zbb zbr zeb zed zee zen zeo zep zer zez znd zne znn zno znp zo- zob zod zoe zon zoo zor zpe zpo zpp zpr zro zrp zzr zzz