-er -ol eee eef eel eeo eer ees eet ef- efe eff efl efo efr efs eft ele elf ell elo elr els elt eo- eoe eof eol eoo eor eos eot ere erf erl ero err ers ert es- ese esf esl eso esr ess est ete etf etl eto etr ets ett fee fef fel feo fer fes fet ffe fff ffl ffo ffr ffs fft fle flf fll flo flr fls flt foe fof fol foo for fos fot fre frf frl fro frr frs frt fse fsf fsl fso fsr fss fst fte ftf ftl fto ftr fts ftt lee lef lel leo ler les let lfe lff lfl lfo lfr lfs lft lle llf lll llo llr lls llt loe lof lol loo lor los lot lrf lro lrr lrs lrt lse lsf lsl lso lsr lss lst lte ltf ltl lto ltr lts ltt oee oef oel oeo oer oes oet of- ofe off ofl ofo ofr ofs oft ole olf oll olo ols olt oo- oof ool ooo oor oos oot or- ore orf orl oro orr ors ort os- ose osf osl oso osr oss ost ot- ote otf otl oto otr ots ott re- ree ref rel reo rer res ret rfe rff rfl rfo rfr rfs rft rle rlf rll rlo rlr rls rlt roe rof rol roo ror ros rot rrf rrl rrr rrs rrt rse rsf rsl rso rsr rss rst rte rtf rtl rto rtr rts rtt se- see sef sel seo ser ses set sfe sff sfl sfo sfr sfs sft sle slf sll slo slr sls slt soe sof sol soo sor sos sot sr- sre srf srl sro srr srs srt ss- sse ssf ssl sso ssr sss sst ste stf stl sto str sts stt te- tee tef tel teo ter tes tet tfe tff tfl tfo tfr tfs tft tle tlf tll tlo tlr tls tlt to- toe tof tol too tor tos tot tre trf trl tro trr trs trt tse tsf tsl tso tsr tss tst tte ttf ttl tto ttr tts ttt