eee eef eem ees eet ef- efe eff efi efm efs eft eie eif eii eim eis eit em- eme emf emi emm ems emt es- ese esf esi esm ess est ete etf eti etm ets ett fee fef fei fem fes fet ffe fff ffi ffm ffs fft fie fif fii fim fis fit fme fmf fmi fmm fms fmt fse fsf fsi fsm fss fst fte ftf fti ftm fts ftt i-f ie- iee ief iei iem ies iet ife iff ifi ifm ifs ift iie iif iii iim iis iit im- ime imf imi imm ims imt is- ise isf isi ism iss ist ite itf iti itm its itt m-f mee mef mei mem mes met mfe mff mfi mfm mfs mft mi- mie mif mii mim mis mit mme mmf mmi mmm mms mmt mse msf msi msm mss mst mte mtf mti mtm mts mtt se- see sef sei sem ses set sfe sff sfi sfm sfs sft sie sif sii sim sis sit sme smf smi smm sms smt ss- sse ssf ssi ssm sss sst ste stf sti stm sts stt te- tee tef tei tem tes tet tfe tff tfi tfm tfs tft tie tif tii tim tis tit tme tmf tmi tmm tms tmt tse tsf tsi tsm tss tst tte ttf tti ttm tts ttt