-er -ol ddd dde ddf ddi ddl ddo ddr dds ddt de- ded dee def dei del deo der des det dfd dfe dff dfi dfl dfo dfr dfs dft di- did die dif dii dil dio dir dis dit dl- dld dle dlf dli dll dlo dlr dls dlt dod doe dof doi dol doo dor dos dot drd dre dri drl dro drr drs drt dsd dse dsf dsi dsl dso dsr dss dst dtd dte dtf dti dtl dto dtr dts dtt ed- edd ede edf edi edl edo edr eds edt eed eee eef eel eeo eer ees eet ef- efd efe eff efi efl efo efr efs eft eid eie eif eii eil eio eir eis eit eld ele elf eli ell elo elr els elt eo- eod eoe eof eoi eol eoo eor eos eot erd ere erf eri erl ero err ers ert es- esd ese esf esi esl eso esr ess est etd ete etf eti etl eto etr ets ett fdd fde fdf fdi fdl fdo fdr fds fdt fed fee fef fei fel feo fer fes fet ffd ffe fff ffi ffl ffo ffr ffs fft fid fie fif fii fil fir fis fit fld fle flf fli fll flo flr fls flt foe fof foi fol foo for fos fot frd fre frf fri frl fro frr frs frt fsd fse fsf fsi fsl fso fsr fss fst ftd fte ftf fti ftl fto ftr fts ftt i-d i-f idd ide idf idi idl ido idr ids idt ie- ied iee ief iei iel ier ies iet ifd ife iff ifi ifl ifo ifr ifs ift iid iie iif iii iil iio iir iis iit il- ild ile ilf ili ill ilo ilr ils ilt io- iod ioe iof ioi iol ioo ior ios iot ir- ird ire irf iri irl iro irr irs irt is- isd ise isf isi isl iso isr iss ist itd ite itf iti itl ito its itt ldd lde ldf ldi ldl ldo ldr lds ldt led lee lef lei lel leo ler les let lfd lfe lff lfi lfl lfo lfr lfs lft lid lie lif lii lil lio lir lis lit lld lle llf lli lll llo llr lls llt lod loe lof loi lol loo lor los lot lrd lrf lri lro lrr lrs lrt lsd lse lsf lsi lsl lso lsr lss lst ltd lte ltf lti ltl lto ltr lts ltt o-i odd ode odf odi odl odo odr ods odt oed oee oef oei oel oeo oer oes oet of- ofd ofe off ofi ofl ofo ofr ofs oft oid oie oif oii oil oio oir ois oit old ole olf oli oll olo ols olt oo- ood oof ooi ool ooo oor oos oot or- ord ore orf ori orl oro orr ors ort os- osd ose osf osi osl oso osr oss ost ot- otd ote otf oti otl oto otr ots ott rdd rde rdf rdi rdl rdo rdr rds rdt re- red ree ref rei rel reo rer res ret rfd rfe rff rfi rfl rfo rfr rfs rft rid rie rif rii ril rio rir ris rit rld rle rlf rli rll rlo rlr rls rlt rod roe rof roi rol roo ror ros rot rrd rrf rri rrl rrr rrs rrt rsd rse rsf rsi rsl rso rsr rss rst rtd rte rtf rti rtl rto rtr rts rtt sdd sde sdf sdi sdl sdo sdr sds sdt se- sed see sef sei sel seo ser ses set sfd sfe sff sfi sfl sfo sfr sfs sft sid sie sif sii sil sio sir sis sit sld sle slf sli sll slo slr sls slt sod soe sof soi sol soo sor sos sot sr- srd sre srf sri srl sro srr srs srt ss- ssd sse ssf ssi ssl sso ssr sss sst std ste stf sti stl sto str sts stt tdd tde tdf tdi tdl tdo tdr tds tdt te- ted tee tef tei tel teo ter tes tet tfd tfe tff tfi tfl tfo tfr tfs tft tid tie tif tii til tio tir tis tit tld tle tlf tli tll tlo tlr tls tlt to- tod toe tof toi tol too tor tos tot trd tre trf tri trl tro trr trs trt tsd tse tsf tsi tsl tso tsr tss tst ttd tte ttf tti ttl tto ttr tts ttt