-er ddd dde ddi ddk ddn ddp ddr dds de- ded dee dei dek den dep der des di- did die dii dik din dip dir dis dke dki dkk dkp dkr dks dnd dne dni dnk dnn dnp dnr dns dpd dpe dpi dpk dpn dpp dpr dps drd dre dri drk drn drp drr drs dsd dse dsi dsk dsn dsp dsr dss ed- edd ede edi edk edn edp edr eds eed eee eek een eep eer ees eid eie eii eik ein eip eir eis ekd eke eki ekp ekr eks en- end ene eni enk enn enp enr ens ep- epd epe epi epn epp epr eps erd ere eri erk ern erp err ers es- esd ese esi esk esn esp esr ess i-d idd ide idi idk idn idp idr ids ie- ied iee iei iek ien iep ier ies iid iie iii iin iip iir iis ike iki ikk ikr iks in- ind ine ini ink inn inp inr ins ipd ipe ipi ipn ipp ipr ips ir- ird ire iri irk irn irp irr irs is- isd ise isi isk isn isp isr iss kde kdk kdp kdr kds ke- ked kee kei kek ken kep ker kes kid kie kii kik kin kip kir kis kke kki kkk kkn kkp kkr kks kn- knd kne kni knk knn knp knr kpd kpe kpi kpk kpn kpp kpr kps krd kri krk krn krp krr krs ksd kse ksi ksk ksn ksp ksr kss n-i ndd nde ndi ndk ndn ndp ndr nds ne- ned nee nei nek nen nep ner nes nid nie nii nik nin nip nir nis nke nki nkk nkn nkp nkr nks nne nni nnk nnn nnp nns npd npe npi npn npp npr nps nrd nre nri nrk nrn nrp nrr nrs nsd nse nsi nsk nsn nsp nsr nss p-p pdd pde pdi pdk pdn pdp pdr pds ped pee pei pek pen pep per pes pid pie pii pik pin pip pir pis pkd pke pki pkn pkp pkr pks pn- pnd pne pni pnk pnn pnp pnr pns ppd ppe ppi ppk ppn ppp ppr pps prd pre pri prk prn prp prr prs ps- psd pse psi psk psn psp psr pss rdd rde rdi rdn rdp rdr rds re- red ree rei rek ren rep rer res rid rie rii rik rin rip rir ris rke rkk rkp rks rnd rni rnn rnp rnr rns rpd rpe rpi rpk rpn rpp rpr rps rrd rri rrk rrn rrp rrr rrs rsd rse rsi rsk rsn rsp rsr rss sdd sde sdi sdk sdn sdp sdr sds se- sed see sei sek sen sep ser ses sid sie sii sik sin sip sir sis sk- skd ske ski skk skp skr sks snd sne sni snk snn snp snr sns spd spe spi spk spn spp spr sps sr- srd sre sri srk srn srp srr srs ss- ssd sse ssi ssk ssn ssp ssr sss