-er b-p bbb bbd bbe bbi bbn bbo bbp bbr bbs bdb bdd bde bdi bdo bdp bdr bds be- beb bed bee bei ben beo bep ber bes bi- bib bid bie bii bin bio bip bir bis bnb bnd bne bni bnn bno bnp bnr bns bob bod boe boi bon boo bop bor bos bpb bpd bpe bpi bpn bpo bpp bpr bps brb brd bre bri brn bro brp brr brs bsb bsd bse bsi bsn bso bsp bsr bss dbb dbd dbe dbi dbn dbo dbp dbr dbs ddb ddd dde ddi ddn ddo ddp ddr dds de- deb ded dee dei den deo dep der des di- dib did die dii din dio dip dir dis dnb dnd dne dni dnn dno dnp dnr dns dob dod doe doi don doo dop dor dos dpb dpd dpe dpi dpn dpo dpp dpr dps drb drd dre dri drn dro drp drr drs dsb dsd dse dsi dsn dso dsp dsr dss ebb ebd ebe ebi ebn ebo ebp ebr ebs ed- edb edd ede edi edn edo edp edr eds eeb eed eee een eeo eep eer ees eib eid eie eii ein eio eip eir eis en- enb end ene eni enn eno enp enr ens eo- eob eod eoe eoi eon eoo eop eor eos ep- epb epd epe epi epn epo epp epr eps erb erd ere eri ern ero erp err ers es- esb esd ese esi esn eso esp esr ess i-d ibb ibd ibe ibi ibn ibo ibp ibr ibs idb idd ide idi idn ido idp idr ids ie- ied iee iei ien iep ier ies iib iid iie iii iin iio iip iir iis in- inb ind ine ini inn ino inp inr ins io- iob iod ioe ioi ion ioo iop ior ios ipb ipd ipe ipi ipn ipo ipp ipr ips ir- irb ird ire iri irn iro irp irr irs is- isb isd ise isi isn iso isp isr iss n-i nbb nbd nbe nbi nbn nbo nbp nbr nbs ndb ndd nde ndi ndn ndo ndp ndr nds ne- neb ned nee nei nen neo nep ner nes nib nid nie nii nin nio nip nir nis nnb nne nni nnn nno nnp nns no- nob nod noe noi non noo nop nor nos npb npd npe npi npn npo npp npr nps nrb nrd nre nri nrn nro nrp nrr nrs nsb nsd nse nsi nsn nso nsp nsr nss o-i ob- obb obd obe obi obn obo obp obr obs odb odd ode odi odn odo odp odr ods oeb oed oee oei oen oeo oep oer oes oib oid oie oii oin oio oip oir ois on- onb ond one oni onn ono onp onr ons oo- oob ood ooi oon ooo oop oor oos op- opb opd ope opi opn opo opp opr ops or- orb ord ore ori orn oro orp orr ors os- osb osd ose osi osn oso osp osr oss p-p pbb pbd pbe pbi pbn pbo pbp pbr pbs pdb pdd pde pdi pdn pdo pdp pdr pds peb ped pee pei pen peo pep per pes pib pid pie pii pin pio pip pir pis pn- pnb pnd pne pni pnn pno pnp pnr pns pob pod poe poi pon poo pop por pos ppb ppd ppe ppi ppn ppo ppp ppr pps prb prd pre pri prn pro prp prr prs ps- psb psd pse psi psn pso psp psr pss rbb rbd rbe rbi rbn rbo rbp rbr rbs rdb rdd rde rdi rdn rdo rdp rdr rds re- reb red ree rei ren reo rep rer res rib rid rie rii rin rio rip rir ris rnb rnd rni rnn rno rnp rnr rns rob rod roe roi ron roo rop ror ros rpb rpd rpe rpi rpn rpo rpp rpr rps rrb rrd rri rrn rrp rrr rrs rsb rsd rse rsi rsn rso rsp rsr rss sbb sbd sbe sbi sbn sbo sbp sbr sbs sdb sdd sde sdi sdn sdo sdp sdr sds se- seb sed see sei sen seo sep ser ses sib sid sie sii sin sio sip sir sis snb snd sne sni snn sno snp snr sns sob sod soe soi son soo sop sor sos spb spd spe spi spn spo spp spr sps sr- srb srd sre sri srn sro srp srr srs ss- ssb ssd sse ssi ssn sso ssp ssr sss