-er -ol b-p bbb bbd bbe bbl bbn bbo bbp bbr bbs bdb bdd bde bdl bdo bdp bdr bds be- beb bed bee bel ben beo bep ber bes blb bld ble bll bln blo blp blr bls bnb bnd bne bnl bnn bno bnp bnr bns bob bod boe bol bon boo bop bor bos bpb bpd bpe bpl bpn bpo bpp bpr bps brb brd bre brl brn bro brp brr brs bsb bsd bse bsl bsn bso bsp bsr bss dbb dbd dbe dbl dbn dbo dbp dbr dbs ddb ddd dde ddl ddn ddo ddp ddr dds de- deb ded dee del den deo dep der des dl- dlb dld dle dll dlo dlp dlr dls dnb dnd dne dnl dnn dno dnp dnr dns dob dod doe dol don doo dop dor dos dpb dpd dpe dpl dpn dpo dpp dpr dps drb drd dre drl drn dro drp drr drs dsb dsd dse dsl dsn dso dsp dsr dss ebb ebd ebe ebl ebn ebo ebp ebr ebs ed- edb edd ede edl edn edo edp edr eds eeb eed eee eel een eeo eep eer ees elb eld ele ell eln elo elp elr els en- enb end ene enl enn eno enp enr ens eo- eob eod eoe eol eon eoo eop eor eos ep- epb epd epe epl epn epo epp epr eps erb erd ere erl ern ero erp err ers es- esb esd ese esl esn eso esp esr ess l-p lbb lbd lbe lbl lbo lbp lbr lbs ldb ldd lde ldl ldn ldo ldp ldr lds leb led lee lel len leo lep ler les llb lld lle lll lln llo llp llr lls lnb lnd lne lnl lnn lno lnp lnr lns lob lod loe lol lon loo lop lor los lpb lpd lpe lpl lpn lpo lpp lpr lps lrb lrd lrn lro lrp lrr lrs lsb lsd lse lsl lsn lso lsp lsr lss nbb nbd nbe nbl nbn nbo nbp nbr nbs ndb ndd nde ndl ndn ndo ndp ndr nds ne- neb ned nee nel nen neo nep ner nes nlb nld nle nll nln nlo nlp nlr nls nnb nne nnl nnn nno nnp nns no- nob nod noe nol non noo nop nor nos npb npd npe npl npn npo npp npr nps nrb nrd nre nrl nrn nro nrp nrr nrs nsb nsd nse nsl nsn nso nsp nsr nss ob- obb obd obe obl obn obo obp obr obs odb odd ode odl odn odo odp odr ods oeb oed oee oel oen oeo oep oer oes olb old ole oll oln olo olp ols on- onb ond one onl onn ono onp onr ons oo- oob ood ool oon ooo oop oor oos op- opb opd ope opl opn opo opp opr ops or- orb ord ore orl orn oro orp orr ors os- osb osd ose osl osn oso osp osr oss p-p pbb pbd pbe pbl pbn pbo pbp pbr pbs pdb pdd pde pdl pdn pdo pdp pdr pds peb ped pee pel pen peo pep per pes plb pld ple pll pln plo plp plr pls pn- pnb pnd pne pnl pnn pno pnp pnr pns pob pod poe pol pon poo pop por pos ppb ppd ppe ppl ppn ppo ppp ppr pps prb prd pre prl prn pro prp prr prs ps- psb psd pse psl psn pso psp psr pss rbb rbd rbe rbl rbn rbo rbp rbr rbs rdb rdd rde rdl rdn rdo rdp rdr rds re- reb red ree rel ren reo rep rer res rld rle rll rln rlo rlp rlr rls rnb rnd rnn rno rnp rnr rns rob rod roe rol ron roo rop ror ros rpb rpd rpe rpl rpn rpo rpp rpr rps rrb rrd rrl rrn rrp rrr rrs rsb rsd rse rsl rsn rso rsp rsr rss sbb sbd sbe sbl sbn sbo sbp sbr sbs sdb sdd sde sdl sdn sdo sdp sdr sds se- seb sed see sel sen seo sep ser ses slb sld sle sll sln slo slp slr sls snb snd sne snl snn sno snp snr sns sob sod soe sol son soo sop sor sos spb spd spe spl spn spo spp spr sps sr- srb srd sre srl srn sro srp srr srs ss- ssb ssd sse ssl ssn sso ssp ssr sss