-er eee een eep eer ees en- ene enn enp enr ens ep- epe epn epp epr eps ere ern erp err ers es- ese esn esp esr ess ne- nee nen nep ner nes nne nnn nnp nns npe npn npp npr nps nre nrn nrp nrr nrs nse nsn nsp nsr nss p-p pee pen pep per pes pn- pne pnn pnp pnr pns ppe ppn ppp ppr pps pre prn prp prr prs ps- pse psn psp psr pss re- ree ren rep rer res rnn rnp rnr rns rpe rpn rpp rpr rps rrn rrp rrr rrs rse rsn rsp rsr rss se- see sen sep ser ses sne snn snp snr sns spe spn spp spr sps sr- sre srn srp srr srs ss- sse ssn ssp ssr sss