-er ddd dde ddi ddk ddn ddp ddr de- ded dee dei dek den dep der dev di- did die dii dik din dip dir div dke dki dkk dkp dkr dnd dne dni dnk dnn dnp dnr dpd dpe dpi dpk dpn dpp dpr dpv drd dre dri drk drn drp drr drv dvd dve dvi dvk dvn dvp dvr ed- edd ede edi edk edn edp edr eed eee eek een eep eer eev eid eie eii eik ein eip eir eiv ekd eke eki ekp ekr ekv en- end ene eni enk enn enp enr env ep- epd epe epi epn epp epr erd ere eri erk ern erp err erv evd eve evi evn evp evr evv i-d i-v idd ide idi idk idn idp idr idv ie- ied iee iei iek ien iep ier iev iid iie iii iin iip iir ike iki ikk ikr ikv in- ind ine ini ink inn inp inr inv ipd ipe ipi ipn ipp ipr ipv ir- ird ire iri irk irn irp irr irv ivd ive ivi ivp ivr ivv kde kdk kdp kdr ke- ked kee kei kek ken kep ker kev kid kie kii kik kin kip kir kiv kke kki kkk kkn kkp kkr kkv kn- knd kne kni knk knn knp knr kpd kpe kpi kpk kpn kpp kpr kpv krd kri krk krn krp krr krv kvi kvk kvn kvp kvr kvv n-i ndd nde ndi ndk ndn ndp ndr ndv ne- ned nee nei nek nen nep ner nev nid nie nii nik nin nip nir niv nke nki nkk nkn nkp nkr nne nni nnk nnn nnp nnv npd npe npi npn npp npr npv nrd nre nri nrk nrn nrp nrr nrv nvd nve nvi nvk nvn nvp nvv p-p pdd pde pdi pdk pdn pdp pdr pdv ped pee pei pek pen pep per pev pid pie pii pik pin pip pir piv pkd pke pki pkn pkp pkr pn- pnd pne pni pnk pnn pnp pnr pnv ppd ppe ppi ppk ppn ppp ppr ppv prd pre pri prk prn prp prr prv pvd pve pvi pvk pvn pvp pvr pvv rdd rde rdi rdn rdp rdr rdv re- red ree rei rek ren rep rer rev rid rie rii rik rin rip rir riv rke rkk rkp rkv rnd rni rnn rnp rnr rnv rpd rpe rpi rpk rpn rpp rpr rpv rrd rri rrk rrn rrp rrr rvd rve rvi rvn rvp rvr rvv v-e vdd vde vdi vdk vdp vdr vdv ved vee vei vek ven vep ver vi- vid vie vii vik vin vip vir viv vkp vn- vnd vni vnp vnr vnv vpd vpe vpi vpk vpn vpp vpr vrd vre vri vrk vrn vrp vrr vvi vvr vvv