-er ddd dde ddi ddn ddp ddr de- ded dee dei den dep der di- did die dii din dip dir dnd dne dni dnn dnp dnr dpd dpe dpi dpn dpp dpr drd dre dri drn drp drr ed- edd ede edi edn edp edr eed eee een eep eer eid eie eii ein eip eir en- end ene eni enn enp enr ep- epd epe epi epn epp epr erd ere eri ern erp err i-d idd ide idi idn idp idr ie- ied iee iei ien iep ier iid iie iii iin iip iir in- ind ine ini inn inp inr ipd ipe ipi ipn ipp ipr ir- ird ire iri irn irp irr n-i ndd nde ndi ndn ndp ndr ne- ned nee nei nen nep ner nid nie nii nin nip nir nne nni nnn nnp npd npe npi npn npp npr nrd nre nri nrn nrp nrr p-p pdd pde pdi pdn pdp pdr ped pee pei pen pep per pid pie pii pin pip pir pn- pnd pne pni pnn pnp pnr ppd ppe ppi ppn ppp ppr prd pre pri prn prp prr rdd rde rdi rdn rdp rdr re- red ree rei ren rep rer rid rie rii rin rip rir rnd rni rnn rnp rnr rpd rpe rpi rpn rpp rpr rrd rri rrn rrp rrr