-er eee eef eeg eer ees eet ef- efe eff efg efr efs eft ege egf egg egr egs egt ere erf erg err ers ert es- ese esf esg esr ess est ete etf etg etr ets ett fee fef feg fer fes fet ffe fff ffg ffr ffs fft fge fgf fgg fgr fgs fgt fre frf frg frr frs frt fse fsf fsg fsr fss fst fte ftf ftg ftr fts ftt ge- gee gef geg ger ges get gfe gff gfr gfs gft ggg ggr ggs ggt gre grf grg grr grs grt gse gsf gsg gsr gss gst gte gtf gtg gtr gts gtt re- ree ref reg rer res ret rfe rff rfg rfr rfs rft rge rgf rgg rgr rgs rgt rrf rrg rrr rrs rrt rse rsf rsg rsr rss rst rte rtf rtg rtr rts rtt se- see sef seg ser ses set sfe sff sfg sfr sfs sft sge sgf sgg sgr sgs sgt sr- sre srf srg srr srs srt ss- sse ssf ssg ssr sss sst ste stf stg str sts stt te- tee tef teg ter tes tet tfe tff tfg tfr tfs tft tge tgf tgg tgr tgs tgt tre trf trg trr trs trt tse tsf tsg tsr tss tst tte ttf ttg ttr tts ttt