-er ddd dde ddi ddp ddr ddz de- ded dee dei dep der dev dez di- did die dii dip dir div diz dpd dpe dpi dpp dpr dpv dpz drd dre dri drp drr drv drz dvd dve dvi dvp dvr dzd dze dzi dzp dzr ed- edd ede edi edp edr eed eee eep eer eev eid eie eii eip eir eiv ep- epd epe epi epp epr epz erd ere eri erp err erv erz evd eve evi evp evr evv eze ezr ezz i-d i-v idd ide idi idp idr idv ie- ied iee iei iep ier iev iid iie iii iip iir ipd ipe ipi ipp ipr ipv ir- ird ire iri irp irr irv ivd ive ivi ivp ivr ivv ize izi izz p-p pdd pde pdi pdp pdr pdv pdz ped pee pei pep per pev pez pid pie pii pip pir piv piz ppd ppe ppi ppp ppr ppv ppz prd pre pri prp prr prv prz pvd pve pvi pvp pvr pvv pvz pzp rdd rde rdi rdp rdr rdv re- red ree rei rep rer rev rez rid rie rii rip rir riv riz rpd rpe rpi rpp rpr rpv rpz rrd rri rrp rrr rvd rve rvi rvp rvr rvv rze v-e vdd vde vdi vdp vdr vdv ved vee vei vep ver vez vi- vid vie vii vip vir viv viz vpd vpe vpi vpp vpr vrd vre vri vrp vrr vvi vvr vvv vvz zdv zed zee zep zer zev zez zid zie zip zir ziv ziz zpe zpi zpp zpr zrp zvi zzr zzz