-er b-p bbb bbe bbi bbl bbn bbp bbr bbs be- beb bee bei bel ben bep ber bes bi- bib bie bii bil bin bip bir bis blb ble bli bll bln blp blr bls bnb bne bni bnl bnn bnp bnr bns bpb bpe bpi bpl bpn bpp bpr bps brb bre bri brl brn brp brr brs bsb bse bsi bsl bsn bsp bsr bss ebb ebe ebi ebl ebn ebp ebr ebs eeb eee eel een eep eer ees eib eie eii eil ein eip eir eis elb ele eli ell eln elp elr els en- enb ene eni enl enn enp enr ens ep- epb epe epi epl epn epp epr eps erb ere eri erl ern erp err ers es- esb ese esi esl esn esp esr ess ibb ibe ibi ibl ibn ibp ibr ibs ie- iee iei iel ien iep ier ies iib iie iii iil iin iip iir iis il- ilb ile ili ill iln ilp ilr ils in- inb ine ini inl inn inp inr ins ipb ipe ipi ipl ipn ipp ipr ips ir- irb ire iri irl irn irp irr irs is- isb ise isi isl isn isp isr iss l-p lbb lbe lbi lbl lbp lbr lbs leb lee lei lel len lep ler les lib lie lii lil lin lip lir lis llb lle lli lll lln llp llr lls lnb lne lni lnl lnn lnp lnr lns lpb lpe lpi lpl lpn lpp lpr lps lrb lri lrn lrp lrr lrs lsb lse lsi lsl lsn lsp lsr lss n-i nbb nbe nbi nbl nbn nbp nbr nbs ne- neb nee nei nel nen nep ner nes nib nie nii nil nin nip nir nis nlb nle nli nll nln nlp nlr nls nnb nne nni nnl nnn nnp nns npb npe npi npl npn npp npr nps nrb nre nri nrl nrn nrp nrr nrs nsb nse nsi nsl nsn nsp nsr nss p-p pbb pbe pbi pbl pbn pbp pbr pbs peb pee pei pel pen pep per pes pib pie pii pil pin pip pir pis plb ple pli pll pln plp plr pls pn- pnb pne pni pnl pnn pnp pnr pns ppb ppe ppi ppl ppn ppp ppr pps prb pre pri prl prn prp prr prs ps- psb pse psi psl psn psp psr pss rbb rbe rbi rbl rbn rbp rbr rbs re- reb ree rei rel ren rep rer res rib rie rii ril rin rip rir ris rle rli rll rln rlp rlr rls rnb rni rnn rnp rnr rns rpb rpe rpi rpl rpn rpp rpr rps rrb rri rrl rrn rrp rrr rrs rsb rse rsi rsl rsn rsp rsr rss sbb sbe sbi sbl sbn sbp sbr sbs se- seb see sei sel sen sep ser ses sib sie sii sil sin sip sir sis slb sle sli sll sln slp slr sls snb sne sni snl snn snp snr sns spb spe spi spl spn spp spr sps sr- srb sre sri srl srn srp srr srs ss- ssb sse ssi ssl ssn ssp ssr sss