-er eee eef eem eer ees eet ef- efe eff efi efm efr efs eft eie eif eii eim eir eis eit em- eme emf emi emm emr ems emt ere erf eri erm err ers ert es- ese esf esi esm esr ess est ete etf eti etm etr ets ett fee fef fei fem fer fes fet ffe fff ffi ffm ffr ffs fft fie fif fii fim fir fis fit fme fmf fmi fmm fmr fms fmt fre frf fri frm frr frs frt fse fsf fsi fsm fsr fss fst fte ftf fti ftm ftr fts ftt i-f ie- iee ief iei iem ier ies iet ife iff ifi ifm ifr ifs ift iie iif iii iim iir iis iit im- ime imf imi imm ims imt ir- ire irf iri irm irr irs irt is- ise isf isi ism isr iss ist ite itf iti itm its itt m-f m-r mee mef mei mem mer mes met mfe mff mfi mfm mfr mfs mft mi- mie mif mii mim mir mis mit mme mmf mmi mmm mmr mms mmt mre mrf mri mrm mrr mrs mrt mse msf msi msm msr mss mst mte mtf mti mtm mtr mts mtt re- ree ref rei rem rer res ret rfe rff rfi rfm rfr rfs rft rie rif rii rim rir ris rit rme rmf rmi rmm rmr rms rmt rrf rri rrm rrr rrs rrt rse rsf rsi rsm rsr rss rst rte rtf rti rtm rtr rts rtt se- see sef sei sem ser ses set sfe sff sfi sfm sfr sfs sft sie sif sii sim sir sis sit sme smf smi smm smr sms smt sr- sre srf sri srm srr srs srt ss- sse ssf ssi ssm ssr sss sst ste stf sti stm str sts stt te- tee tef tei tem ter tes tet tfe tff tfi tfm tfr tfs tft tie tif tii tim tir tis tit tme tmf tmi tmm tmr tms tmt tre trf tri trm trr trs trt tse tsf tsi tsm tsr tss tst tte ttf tti ttm ttr tts ttt