-er -ol ddd dde ddl ddo ddp ddr de- ded dee del deo dep der dev dl- dld dle dll dlo dlp dlr dlv dod doe dol doo dop dor dov dpd dpe dpl dpo dpp dpr dpv drd dre drl dro drp drr drv dvd dve dvl dvp dvr ed- edd ede edl edo edp edr eed eee eel eeo eep eer eev eld ele ell elo elp elr elv eo- eod eoe eol eoo eop eor ep- epd epe epl epo epp epr erd ere erl ero erp err erv evd eve evl evo evp evr evv l-p ldd lde ldl ldo ldp ldr ldv led lee lel leo lep ler lev lld lle lll llo llp llr llv lod loe lol loo lop lor lov lpd lpe lpl lpo lpp lpr lpv lrd lro lrp lrr lrv lvd lve lvl lvp lvr lvv odd ode odl odo odp odr odv oed oee oel oeo oep oer old ole oll olo olp oo- ood ool ooo oop oor oov op- opd ope opl opo opp opr opv or- ord ore orl oro orp orr orv ov- ovd ove ovl ovo ovp ovv p-p pdd pde pdl pdo pdp pdr pdv ped pee pel peo pep per pev pld ple pll plo plp plr plv pod poe pol poo pop por pov ppd ppe ppl ppo ppp ppr ppv prd pre prl pro prp prr prv pvd pve pvl pvo pvp pvr pvv rdd rde rdl rdo rdp rdr rdv re- red ree rel reo rep rer rev rld rle rll rlo rlp rlr rod roe rol roo rop ror rov rpd rpe rpl rpo rpp rpr rpv rrd rrl rrp rrr rvd rve rvl rvo rvp rvr rvv v-e vdd vde vdl vdo vdp vdr vdv ved vee vel veo vep ver vl- vld vle vll vlo vlp vlv vod voe vol voo vop vor vov vpd vpe vpl vpo vpp vpr vrd vre vrp vrr vvo vvr vvv