fff ffi ffm ffo ffp ffr ffs fft fif fii fim fip fir fis fit fmf fmi fmm fmo fmp fmr fms fmt fof foi fom foo fop for fos fot fpi fpm fpo fpp fpr fps fpt frf fri frm fro frp frr frs frt fsf fsi fsm fso fsp fsr fss fst ftf fti ftm fto ftp ftr fts ftt i-f iff ifi ifm ifo ifp ifr ifs ift iif iii iim iio iip iir iis iit im- imf imi imm imo imp ims imt io- iof ioi iom ioo iop ior ios iot ipf ipi ipm ipo ipp ipr ips ipt ir- irf iri irm iro irp irr irs irt is- isf isi ism iso isp isr iss ist itf iti itm ito itp its itt m-f m-o m-r mff mfi mfm mfo mfp mfr mfs mft mi- mif mii mim mio mip mir mis mit mmf mmi mmm mmo mmp mmr mms mmt mof moi mom moo mop mor mos mot mpf mpi mpm mpo mpp mpr mps mpt mrf mri mrm mro mrp mrr mrs mrt msf msi msm mso msp msr mss mst mtf mti mtm mto mtp mtr mts mtt o-i of- off ofi ofm ofo ofp ofr ofs oft oif oii oim oio oip oir ois oit om- omf omi omm omo omp omr oms omt oo- oof ooi oom ooo oop oor oos oot op- opf opi opm opo opp opr ops opt or- orf ori orm oro orp orr ors ort os- osf osi osm oso osp osr oss ost ot- otf oti otm oto otp otr ots ott p-p pff pfi pfm pfo pfp pfr pfs pft pif pii pim pio pip pir pis pit pmf pmi pmm pmo pmp pmr pms pmt pof poi pom poo pop por pos pot ppf ppi ppm ppo ppp ppr pps ppt prf pri prm pro prp prr prs prt ps- psf psi psm pso psp psr pss pst pt- ptf pti ptm pto ptp ptr pts ptt rff rfi rfm rfo rfp rfr rfs rft rif rii rim rio rip rir ris rit rmf rmi rmm rmo rmp rmr rms rmt rof roi rom roo rop ror ros rot rpf rpi rpm rpo rpp rpr rps rpt rrf rri rrm rrp rrr rrs rrt rsf rsi rsm rso rsp rsr rss rst rtf rti rtm rto rtp rtr rts rtt sff sfi sfm sfo sfp sfr sfs sft sif sii sim sio sip sir sis sit smf smi smm smo smp smr sms smt sof soi som soo sop sor sos sot spf spi spm spo spp spr sps spt sr- srf sri srm sro srp srr srs srt ss- ssf ssi ssm sso ssp ssr sss sst stf sti stm sto stp str sts stt tff tfi tfm tfo tfp tfr tfs tft tif tii tim tio tip tir tis tit tmf tmi tmm tmo tmp tmr tms tmt to- tof toi tom too top tor tos tot tpf tpi tpm tpo tpp tpr tps tpt trf tri trm tro trp trr trs trt tsf tsi tsm tso tsp tsr tss tst ttf tti ttm tto ttp ttr tts ttt