-er ddd dde ddl ddp ddr dds de- ded dee del dep der des dl- dld dle dll dlp dlr dls dpd dpe dpl dpp dpr dps drd dre drl drp drr drs dsd dse dsl dsp dsr dss ed- edd ede edl edp edr eds eed eee eel eep eer ees eld ele ell elp elr els ep- epd epe epl epp epr eps erd ere erl erp err ers es- esd ese esl esp esr ess l-p ldd lde ldl ldp ldr lds led lee lel lep ler les lld lle lll llp llr lls lpd lpe lpl lpp lpr lps lrd lrp lrr lrs lsd lse lsl lsp lsr lss p-p pdd pde pdl pdp pdr pds ped pee pel pep per pes pld ple pll plp plr pls ppd ppe ppl ppp ppr pps prd pre prl prp prr prs ps- psd pse psl psp psr pss rdd rde rdl rdp rdr rds re- red ree rel rep rer res rld rle rll rlp rlr rls rpd rpe rpl rpp rpr rps rrd rrl rrp rrr rrs rsd rse rsl rsp rsr rss sdd sde sdl sdp sdr sds se- sed see sel sep ser ses sld sle sll slp slr sls spd spe spl spp spr sps sr- srd sre srl srp srr srs ss- ssd sse ssl ssp ssr sss