-er ddd dde ddl ddp ddr de- ded dee del dep der dev dl- dld dle dll dlp dlr dlv dpd dpe dpl dpp dpr dpv drd dre drl drp drr drv dvd dve dvl dvp dvr ed- edd ede edl edp edr eed eee eel eep eer eev eld ele ell elp elr elv ep- epd epe epl epp epr erd ere erl erp err erv evd eve evl evp evr evv l-p ldd lde ldl ldp ldr ldv led lee lel lep ler lev lld lle lll llp llr llv lpd lpe lpl lpp lpr lpv lrd lrp lrr lrv lvd lve lvl lvp lvr lvv p-p pdd pde pdl pdp pdr pdv ped pee pel pep per pev pld ple pll plp plr plv ppd ppe ppl ppp ppr ppv prd pre prl prp prr prv pvd pve pvl pvp pvr pvv rdd rde rdl rdp rdr rdv re- red ree rel rep rer rev rld rle rll rlp rlr rpd rpe rpl rpp rpr rpv rrd rrl rrp rrr rvd rve rvl rvp rvr rvv v-e vdd vde vdl vdp vdr vdv ved vee vel vep ver vl- vld vle vll vlp vlv vpd vpe vpl vpp vpr vrd vre vrp vrr vvr vvv