-er ddd dde ddl ddm ddr dds ddt de- ded dee del dem der des det dl- dld dle dll dlm dlr dls dlt dmd dme dml dmm dmr dms dmt drd dre drl drm drr drs drt dsd dse dsl dsm dsr dss dst dtd dte dtl dtm dtr dts dtt ed- edd ede edl edm edr eds edt eed eee eel eem eer ees eet eld ele ell elm elr els elt em- emd eme eml emm emr ems emt erd ere erl erm err ers ert es- esd ese esl esm esr ess est etd ete etl etm etr ets ett ldd lde ldl ldm ldr lds ldt led lee lel lem ler les let lld lle lll llm llr lls llt lmd lme lml lmm lmr lms lmt lrd lrm lrr lrs lrt lsd lse lsl lsm lsr lss lst ltd lte ltl ltm ltr lts ltt m-r mdd mde mdl mdm mdr mds mdt med mee mel mem mer mes met mld mle mll mlm mlr mls mlt mmd mme mml mmm mmr mms mmt mrd mre mrl mrm mrr mrs mrt msd mse msl msm msr mss mst mtd mte mtl mtm mtr mts mtt rdd rde rdl rdm rdr rds rdt re- red ree rel rem rer res ret rld rle rll rlm rlr rls rlt rmd rme rml rmm rmr rms rmt rrd rrl rrm rrr rrs rrt rsd rse rsl rsm rsr rss rst rtd rte rtl rtm rtr rts rtt sdd sde sdl sdm sdr sds sdt se- sed see sel sem ser ses set sld sle sll slm slr sls slt smd sme sml smm smr sms smt sr- srd sre srl srm srr srs srt ss- ssd sse ssl ssm ssr sss sst std ste stl stm str sts stt tdd tde tdl tdm tdr tds tdt te- ted tee tel tem ter tes tet tld tle tll tlm tlr tls tlt tmd tme tml tmm tmr tms tmt trd tre trl trm trr trs trt tsd tse tsl tsm tsr tss tst ttd tte ttl ttm ttr tts ttt