-er ddd dde ddi ddk ddn ddp ddr de- ded dee dei dek den dep der di- did die dii dik din dip dir dke dki dkk dkp dkr dnd dne dni dnk dnn dnp dnr dpd dpe dpi dpk dpn dpp dpr drd dre dri drk drn drp drr ed- edd ede edi edk edn edp edr eed eee eek een eep eer eid eie eii eik ein eip eir ekd eke eki ekp ekr en- end ene eni enk enn enp enr ep- epd epe epi epn epp epr erd ere eri erk ern erp err i-d idd ide idi idk idn idp idr ie- ied iee iei iek ien iep ier iid iie iii iin iip iir ike iki ikk ikr in- ind ine ini ink inn inp inr ipd ipe ipi ipn ipp ipr ir- ird ire iri irk irn irp irr kde kdk kdp kdr ke- ked kee kei kek ken kep ker kid kie kii kik kin kip kir kke kki kkk kkn kkp kkr kn- knd kne kni knk knn knp knr kpd kpe kpi kpk kpn kpp kpr krd kri krk krn krp krr n-i ndd nde ndi ndk ndn ndp ndr ne- ned nee nei nek nen nep ner nid nie nii nik nin nip nir nke nki nkk nkn nkp nkr nne nni nnk nnn nnp npd npe npi npn npp npr nrd nre nri nrk nrn nrp nrr p-p pdd pde pdi pdk pdn pdp pdr ped pee pei pek pen pep per pid pie pii pik pin pip pir pkd pke pki pkn pkp pkr pn- pnd pne pni pnk pnn pnp pnr ppd ppe ppi ppk ppn ppp ppr prd pre pri prk prn prp prr rdd rde rdi rdn rdp rdr re- red ree rei rek ren rep rer rid rie rii rik rin rip rir rke rkk rkp rnd rni rnn rnp rnr rpd rpe rpi rpk rpn rpp rpr rrd rri rrk rrn rrp rrr