-er eee eef eem eeo eer ef- efe eff efi efm efo efr eie eif eii eim eio eir em- eme emf emi emm emo emr eo- eoe eof eoi eom eoo eor ere erf eri erm ero err fee fef fei fem feo fer ffe fff ffi ffm ffo ffr fie fif fii fim fir fme fmf fmi fmm fmo fmr foe fof foi fom foo for fre frf fri frm fro frr i-f ie- iee ief iei iem ier ife iff ifi ifm ifo ifr iie iif iii iim iio iir im- ime imf imi imm imo io- ioe iof ioi iom ioo ior ir- ire irf iri irm iro irr m-f m-o m-r mee mef mei mem meo mer mfe mff mfi mfm mfo mfr mi- mie mif mii mim mio mir mme mmf mmi mmm mmo mmr moe mof moi mom moo mor mre mrf mri mrm mro mrr o-i oee oef oei oem oeo oer of- ofe off ofi ofm ofo ofr oie oif oii oim oio oir om- ome omf omi omm omo omr oo- oof ooi oom ooo oor or- ore orf ori orm oro orr re- ree ref rei rem reo rer rfe rff rfi rfm rfo rfr rie rif rii rim rio rir rme rmf rmi rmm rmo rmr roe rof roi rom roo ror rrf rri rrm rrr