fff ffi ffm ffo ffp ffs fft fif fii fim fip fis fit fmf fmi fmm fmo fmp fms fmt fof foi fom foo fop fos fot fpi fpm fpo fpp fps fpt fsf fsi fsm fso fsp fss fst ftf fti ftm fto ftp fts ftt i-f iff ifi ifm ifo ifp ifs ift iif iii iim iio iip iis iit im- imf imi imm imo imp ims imt io- iof ioi iom ioo iop ios iot ipf ipi ipm ipo ipp ips ipt is- isf isi ism iso isp iss ist itf iti itm ito itp its itt m-f m-o mff mfi mfm mfo mfp mfs mft mi- mif mii mim mio mip mis mit mmf mmi mmm mmo mmp mms mmt mof moi mom moo mop mos mot mpf mpi mpm mpo mpp mps mpt msf msi msm mso msp mss mst mtf mti mtm mto mtp mts mtt o-i of- off ofi ofm ofo ofp ofs oft oif oii oim oio oip ois oit om- omf omi omm omo omp oms omt oo- oof ooi oom ooo oop oos oot op- opf opi opm opo opp ops opt os- osf osi osm oso osp oss ost ot- otf oti otm oto otp ots ott p-p pff pfi pfm pfo pfp pfs pft pif pii pim pio pip pis pit pmf pmi pmm pmo pmp pms pmt pof poi pom poo pop pos pot ppf ppi ppm ppo ppp pps ppt ps- psf psi psm pso psp pss pst pt- ptf pti ptm pto ptp pts ptt sff sfi sfm sfo sfp sfs sft sif sii sim sio sip sis sit smf smi smm smo smp sms smt sof soi som soo sop sos sot spf spi spm spo spp sps spt ss- ssf ssi ssm sso ssp sss sst stf sti stm sto stp sts stt tff tfi tfm tfo tfp tfs tft tif tii tim tio tip tis tit tmf tmi tmm tmo tmp tms tmt to- tof toi tom too top tos tot tpf tpi tpm tpo tpp tps tpt tsf tsi tsm tso tsp tss tst ttf tti ttm tto ttp tts ttt