fff ffm ffp ffs fft fmf fmm fmp fms fmt fpm fpp fps fpt fsf fsm fsp fss fst ftf ftm ftp fts ftt m-f mff mfm mfp mfs mft mmf mmm mmp mms mmt mpf mpm mpp mps mpt msf msm msp mss mst mtf mtm mtp mts mtt p-p pff pfm pfp pfs pft pmf pmm pmp pms pmt ppf ppm ppp pps ppt ps- psf psm psp pss pst pt- ptf ptm ptp pts ptt sff sfm sfp sfs sft smf smm smp sms smt spf spm spp sps spt ss- ssf ssm ssp sss sst stf stm stp sts stt tff tfm tfp tfs tft tmf tmm tmp tms tmt tpf tpm tpp tps tpt tsf tsm tsp tss tst ttf ttm ttp tts ttt