-er eee eef eeo eer eet ef- efe eff efi efo efr eft eie eif eii eio eir eit eo- eoe eof eoi eoo eor eot ere erf eri ero err ert ete etf eti eto etr ett fee fef fei feo fer fet ffe fff ffi ffo ffr fft fie fif fii fir fit foe fof foi foo for fot fre frf fri fro frr frt fte ftf fti fto ftr ftt i-f ie- iee ief iei ier iet ife iff ifi ifo ifr ift iie iif iii iio iir iit io- ioe iof ioi ioo ior iot ir- ire irf iri iro irr irt ite itf iti ito itt o-i oee oef oei oeo oer oet of- ofe off ofi ofo ofr oft oie oif oii oio oir oit oo- oof ooi ooo oor oot or- ore orf ori oro orr ort ot- ote otf oti oto otr ott re- ree ref rei reo rer ret rfe rff rfi rfo rfr rft rie rif rii rio rir rit roe rof roi roo ror rot rrf rri rrr rrt rte rtf rti rto rtr rtt te- tee tef tei teo ter tet tfe tff tfi tfo tfr tft tie tif tii tio tir tit to- toe tof toi too tor tot tre trf tri tro trr trt tte ttf tti tto ttr ttt