-er -ol ddd dde ddf ddl ddo ddr dds ddt de- ded dee def del deo der des det dfd dfe dff dfl dfo dfr dfs dft dl- dld dle dlf dll dlo dlr dls dlt dod doe dof dol doo dor dos dot drd dre drl dro drr drs drt dsd dse dsf dsl dso dsr dss dst dtd dte dtf dtl dto dtr dts dtt ed- edd ede edf edl edo edr eds edt eed eee eef eel eeo eer ees eet ef- efd efe eff efl efo efr efs eft eld ele elf ell elo elr els elt eo- eod eoe eof eol eoo eor eos eot erd ere erf erl ero err ers ert es- esd ese esf esl eso esr ess est etd ete etf etl eto etr ets ett fdd fde fdf fdl fdo fdr fds fdt fed fee fef fel feo fer fes fet ffd ffe fff ffl ffo ffr ffs fft fld fle flf fll flo flr fls flt foe fof fol foo for fos fot frd fre frf frl fro frr frs frt fsd fse fsf fsl fso fsr fss fst ftd fte ftf ftl fto ftr fts ftt ldd lde ldf ldl ldo ldr lds ldt led lee lef lel leo ler les let lfd lfe lff lfl lfo lfr lfs lft lld lle llf lll llo llr lls llt lod loe lof lol loo lor los lot lrd lrf lro lrr lrs lrt lsd lse lsf lsl lso lsr lss lst ltd lte ltf ltl lto ltr lts ltt odd ode odf odl odo odr ods odt oed oee oef oel oeo oer oes oet of- ofd ofe off ofl ofo ofr ofs oft old ole olf oll olo ols olt oo- ood oof ool ooo oor oos oot or- ord ore orf orl oro orr ors ort os- osd ose osf osl oso osr oss ost ot- otd ote otf otl oto otr ots ott rdd rde rdf rdl rdo rdr rds rdt re- red ree ref rel reo rer res ret rfd rfe rff rfl rfo rfr rfs rft rld rle rlf rll rlo rlr rls rlt rod roe rof rol roo ror ros rot rrd rrf rrl rrr rrs rrt rsd rse rsf rsl rso rsr rss rst rtd rte rtf rtl rto rtr rts rtt sdd sde sdf sdl sdo sdr sds sdt se- sed see sef sel seo ser ses set sfd sfe sff sfl sfo sfr sfs sft sld sle slf sll slo slr sls slt sod soe sof sol soo sor sos sot sr- srd sre srf srl sro srr srs srt ss- ssd sse ssf ssl sso ssr sss sst std ste stf stl sto str sts stt tdd tde tdf tdl tdo tdr tds tdt te- ted tee tef tel teo ter tes tet tfd tfe tff tfl tfo tfr tfs tft tld tle tlf tll tlo tlr tls tlt to- tod toe tof tol too tor tos tot trd tre trf trl tro trr trs trt tsd tse tsf tsl tso tsr tss tst ttd tte ttf ttl tto ttr tts ttt