-er -ol ddd dde ddl ddo ddr dds ddt de- ded dee del deo der des det dl- dld dle dll dlo dlr dls dlt dod doe dol doo dor dos dot drd dre drl dro drr drs drt dsd dse dsl dso dsr dss dst dtd dte dtl dto dtr dts dtt ed- edd ede edl edo edr eds edt eed eee eel eeo eer ees eet eld ele ell elo elr els elt eo- eod eoe eol eoo eor eos eot erd ere erl ero err ers ert es- esd ese esl eso esr ess est etd ete etl eto etr ets ett ldd lde ldl ldo ldr lds ldt led lee lel leo ler les let lld lle lll llo llr lls llt lod loe lol loo lor los lot lrd lro lrr lrs lrt lsd lse lsl lso lsr lss lst ltd lte ltl lto ltr lts ltt odd ode odl odo odr ods odt oed oee oel oeo oer oes oet old ole oll olo ols olt oo- ood ool ooo oor oos oot or- ord ore orl oro orr ors ort os- osd ose osl oso osr oss ost ot- otd ote otl oto otr ots ott rdd rde rdl rdo rdr rds rdt re- red ree rel reo rer res ret rld rle rll rlo rlr rls rlt rod roe rol roo ror ros rot rrd rrl rrr rrs rrt rsd rse rsl rso rsr rss rst rtd rte rtl rto rtr rts rtt sdd sde sdl sdo sdr sds sdt se- sed see sel seo ser ses set sld sle sll slo slr sls slt sod soe sol soo sor sos sot sr- srd sre srl sro srr srs srt ss- ssd sse ssl sso ssr sss sst std ste stl sto str sts stt tdd tde tdl tdo tdr tds tdt te- ted tee tel teo ter tes tet tld tle tll tlo tlr tls tlt to- tod toe tol too tor tos tot trd tre trl tro trr trs trt tsd tse tsl tso tsr tss tst ttd tte ttl tto ttr tts ttt