-er b-p bbb bbd bbe bbo bbp bbr bdb bdd bde bdo bdp bdr bdz be- beb bed bee beo bep ber bez bob bod boe boo bop bor boz bpb bpd bpe bpo bpp bpr brb brd bre bro brp brr brz bzd bze bzo bzp bzr bzz dbb dbd dbe dbo dbp dbr dbz ddb ddd dde ddo ddp ddr ddz de- deb ded dee deo dep der dez dob dod doe doo dop dor doz dpb dpd dpe dpo dpp dpr dpz drb drd dre dro drp drr drz dzb dzd dze dzo dzp dzr ebb ebd ebe ebo ebp ebr ed- edb edd ede edo edp edr eeb eed eee eeo eep eer eo- eob eod eoe eoo eop eor ep- epb epd epe epo epp epr epz erb erd ere ero erp err erz eze ezo ezr ezz ob- obb obd obe obo obp obr odb odd ode odo odp odr oeb oed oee oeo oep oer oo- oob ood ooo oop oor op- opb opd ope opo opp opr or- orb ord ore oro orp orr orz oze ozo ozz p-p pbb pbd pbe pbo pbp pbr pbz pdb pdd pde pdo pdp pdr pdz peb ped pee peo pep per pez pob pod poe poo pop por poz ppb ppd ppe ppo ppp ppr ppz prb prd pre pro prp prr prz pzp rbb rbd rbe rbo rbp rbr rdb rdd rde rdo rdp rdr re- reb red ree reo rep rer rez rob rod roe roo rop ror roz rpb rpd rpe rpo rpp rpr rpz rrb rrd rrp rrr rzb rze rzo zbb zbr zeb zed zee zeo zep zer zez zo- zob zod zoe zoo zor zpe zpo zpp zpr zro zrp zzr zzz