fff ffi ffm ffo ffr ffs fft fif fii fim fir fis fit fmf fmi fmm fmo fmr fms fmt fof foi fom foo for fos fot frf fri frm fro frr frs frt fsf fsi fsm fso fsr fss fst ftf fti ftm fto ftr fts ftt i-f iff ifi ifm ifo ifr ifs ift iif iii iim iio iir iis iit im- imf imi imm imo ims imt io- iof ioi iom ioo ior ios iot ir- irf iri irm iro irr irs irt is- isf isi ism iso isr iss ist itf iti itm ito its itt m-f m-o m-r mff mfi mfm mfo mfr mfs mft mi- mif mii mim mio mir mis mit mmf mmi mmm mmo mmr mms mmt mof moi mom moo mor mos mot mrf mri mrm mro mrr mrs mrt msf msi msm mso msr mss mst mtf mti mtm mto mtr mts mtt o-i of- off ofi ofm ofo ofr ofs oft oif oii oim oio oir ois oit om- omf omi omm omo omr oms omt oo- oof ooi oom ooo oor oos oot or- orf ori orm oro orr ors ort os- osf osi osm oso osr oss ost ot- otf oti otm oto otr ots ott rff rfi rfm rfo rfr rfs rft rif rii rim rio rir ris rit rmf rmi rmm rmo rmr rms rmt rof roi rom roo ror ros rot rrf rri rrm rrr rrs rrt rsf rsi rsm rso rsr rss rst rtf rti rtm rto rtr rts rtt sff sfi sfm sfo sfr sfs sft sif sii sim sio sir sis sit smf smi smm smo smr sms smt sof soi som soo sor sos sot sr- srf sri srm sro srr srs srt ss- ssf ssi ssm sso ssr sss sst stf sti stm sto str sts stt tff tfi tfm tfo tfr tfs tft tif tii tim tio tir tis tit tmf tmi tmm tmo tmr tms tmt to- tof toi tom too tor tos tot trf tri trm tro trr trs trt tsf tsi tsm tso tsr tss tst ttf tti ttm tto ttr tts ttt