fff ffi ffm ffo fft fif fii fim fit fmf fmi fmm fmo fmt fof foi fom foo fot ftf fti ftm fto ftt i-f iff ifi ifm ifo ift iif iii iim iio iit im- imf imi imm imo imt io- iof ioi iom ioo iot itf iti itm ito itt m-f m-o mff mfi mfm mfo mft mi- mif mii mim mio mit mmf mmi mmm mmo mmt mof moi mom moo mot mtf mti mtm mto mtt o-i of- off ofi ofm ofo oft oif oii oim oio oit om- omf omi omm omo omt oo- oof ooi oom ooo oot ot- otf oti otm oto ott tff tfi tfm tfo tft tif tii tim tio tit tmf tmi tmm tmo tmt to- tof toi tom too tot ttf tti ttm tto ttt