-er ddd dde ddf ddl ddp ddr de- ded dee def del dep der dfd dfe dff dfl dfp dfr dl- dld dle dlf dll dlp dlr dpd dpe dpf dpl dpp dpr drd dre drl drp drr ed- edd ede edf edl edp edr eed eee eef eel eep eer ef- efd efe eff efl efp efr eld ele elf ell elp elr ep- epd epe epf epl epp epr erd ere erf erl erp err fdd fde fdf fdl fdp fdr fed fee fef fel fep fer ffd ffe fff ffl ffp ffr fld fle flf fll flp flr fpd fpe fpl fpp fpr frd fre frf frl frp frr l-p ldd lde ldf ldl ldp ldr led lee lef lel lep ler lfd lfe lff lfl lfp lfr lld lle llf lll llp llr lpd lpe lpf lpl lpp lpr lrd lrf lrp lrr p-p pdd pde pdf pdl pdp pdr ped pee pef pel pep per pfd pfe pff pfl pfp pfr pld ple plf pll plp plr ppd ppe ppf ppl ppp ppr prd pre prf prl prp prr rdd rde rdf rdl rdp rdr re- red ree ref rel rep rer rfd rfe rff rfl rfp rfr rld rle rlf rll rlp rlr rpd rpe rpf rpl rpp rpr rrd rrf rrl rrp rrr