-er -ol ddd dde ddl ddo ddp ddr dds de- ded dee del deo dep der des dl- dld dle dll dlo dlp dlr dls dod doe dol doo dop dor dos dpd dpe dpl dpo dpp dpr dps drd dre drl dro drp drr drs dsd dse dsl dso dsp dsr dss ed- edd ede edl edo edp edr eds eed eee eel eeo eep eer ees eld ele ell elo elp elr els eo- eod eoe eol eoo eop eor eos ep- epd epe epl epo epp epr eps erd ere erl ero erp err ers es- esd ese esl eso esp esr ess l-p ldd lde ldl ldo ldp ldr lds led lee lel leo lep ler les lld lle lll llo llp llr lls lod loe lol loo lop lor los lpd lpe lpl lpo lpp lpr lps lrd lro lrp lrr lrs lsd lse lsl lso lsp lsr lss odd ode odl odo odp odr ods oed oee oel oeo oep oer oes old ole oll olo olp ols oo- ood ool ooo oop oor oos op- opd ope opl opo opp opr ops or- ord ore orl oro orp orr ors os- osd ose osl oso osp osr oss p-p pdd pde pdl pdo pdp pdr pds ped pee pel peo pep per pes pld ple pll plo plp plr pls pod poe pol poo pop por pos ppd ppe ppl ppo ppp ppr pps prd pre prl pro prp prr prs ps- psd pse psl pso psp psr pss rdd rde rdl rdo rdp rdr rds re- red ree rel reo rep rer res rld rle rll rlo rlp rlr rls rod roe rol roo rop ror ros rpd rpe rpl rpo rpp rpr rps rrd rrl rrp rrr rrs rsd rse rsl rso rsp rsr rss sdd sde sdl sdo sdp sdr sds se- sed see sel seo sep ser ses sld sle sll slo slp slr sls sod soe sol soo sop sor sos spd spe spl spo spp spr sps sr- srd sre srl sro srp srr srs ss- ssd sse ssl sso ssp ssr sss