-er ddd dde ddi ddn ddp ddr de- ded dee dei den dep der dev di- did die dii din dip dir div dnd dne dni dnn dnp dnr dpd dpe dpi dpn dpp dpr dpv drd dre dri drn drp drr drv dvd dve dvi dvn dvp dvr ed- edd ede edi edn edp edr eed eee een eep eer eev eid eie eii ein eip eir eiv en- end ene eni enn enp enr env ep- epd epe epi epn epp epr erd ere eri ern erp err erv evd eve evi evn evp evr evv i-d i-v idd ide idi idn idp idr idv ie- ied iee iei ien iep ier iev iid iie iii iin iip iir in- ind ine ini inn inp inr inv ipd ipe ipi ipn ipp ipr ipv ir- ird ire iri irn irp irr irv ivd ive ivi ivp ivr ivv n-i ndd nde ndi ndn ndp ndr ndv ne- ned nee nei nen nep ner nev nid nie nii nin nip nir niv nne nni nnn nnp nnv npd npe npi npn npp npr npv nrd nre nri nrn nrp nrr nrv nvd nve nvi nvn nvp nvv p-p pdd pde pdi pdn pdp pdr pdv ped pee pei pen pep per pev pid pie pii pin pip pir piv pn- pnd pne pni pnn pnp pnr pnv ppd ppe ppi ppn ppp ppr ppv prd pre pri prn prp prr prv pvd pve pvi pvn pvp pvr pvv rdd rde rdi rdn rdp rdr rdv re- red ree rei ren rep rer rev rid rie rii rin rip rir riv rnd rni rnn rnp rnr rnv rpd rpe rpi rpn rpp rpr rpv rrd rri rrn rrp rrr rvd rve rvi rvn rvp rvr rvv v-e vdd vde vdi vdp vdr vdv ved vee vei ven vep ver vi- vid vie vii vin vip vir viv vn- vnd vni vnp vnr vnv vpd vpe vpi vpn vpp vpr vrd vre vri vrn vrp vrr vvi vvr vvv