-er ddd dde ddl ddp ddr dds ddt de- ded dee del dep der des det dl- dld dle dll dlp dlr dls dlt dpd dpe dpl dpp dpr dps dpt drd dre drl drp drr drs drt dsd dse dsl dsp dsr dss dst dtd dte dtl dtp dtr dts dtt ed- edd ede edl edp edr eds edt eed eee eel eep eer ees eet eld ele ell elp elr els elt ep- epd epe epl epp epr eps ept erd ere erl erp err ers ert es- esd ese esl esp esr ess est etd ete etl etp etr ets ett l-p ldd lde ldl ldp ldr lds ldt led lee lel lep ler les let lld lle lll llp llr lls llt lpd lpe lpl lpp lpr lps lpt lrd lrp lrr lrs lrt lsd lse lsl lsp lsr lss lst ltd lte ltl ltp ltr lts ltt p-p pdd pde pdl pdp pdr pds pdt ped pee pel pep per pes pet pld ple pll plp plr pls plt ppd ppe ppl ppp ppr pps ppt prd pre prl prp prr prs prt ps- psd pse psl psp psr pss pst pt- ptd pte ptl ptp ptr pts ptt rdd rde rdl rdp rdr rds rdt re- red ree rel rep rer res ret rld rle rll rlp rlr rls rlt rpd rpe rpl rpp rpr rps rpt rrd rrl rrp rrr rrs rrt rsd rse rsl rsp rsr rss rst rtd rte rtl rtp rtr rts rtt sdd sde sdl sdp sdr sds sdt se- sed see sel sep ser ses set sld sle sll slp slr sls slt spd spe spl spp spr sps spt sr- srd sre srl srp srr srs srt ss- ssd sse ssl ssp ssr sss sst std ste stl stp str sts stt tdd tde tdl tdp tdr tds tdt te- ted tee tel tep ter tes tet tld tle tll tlp tlr tls tlt tpd tpe tpl tpp tpr tps tpt trd tre trl trp trr trs trt tsd tse tsl tsp tsr tss tst ttd tte ttl ttp ttr tts ttt