fff ffi ffl ffm ffs fft fif fii fil fim fis fit flf fli fll flm fls flt fmf fmi fml fmm fms fmt fsf fsi fsl fsm fss fst ftf fti ftl ftm fts ftt i-f iff ifi ifl ifm ifs ift iif iii iil iim iis iit il- ilf ili ill ilm ils ilt im- imf imi iml imm ims imt is- isf isi isl ism iss ist itf iti itl itm its itt lff lfi lfl lfm lfs lft lif lii lil lim lis lit llf lli lll llm lls llt lmf lmi lml lmm lms lmt lsf lsi lsl lsm lss lst ltf lti ltl ltm lts ltt m-f mff mfi mfl mfm mfs mft mi- mif mii mil mim mis mit mlf mli mll mlm mls mlt mmf mmi mml mmm mms mmt msf msi msl msm mss mst mtf mti mtl mtm mts mtt sff sfi sfl sfm sfs sft sif sii sil sim sis sit slf sli sll slm sls slt smf smi sml smm sms smt ss- ssf ssi ssl ssm sss sst stf sti stl stm sts stt tff tfi tfl tfm tfs tft tif tii til tim tis tit tlf tli tll tlm tls tlt tmf tmi tml tmm tms tmt tsf tsi tsl tsm tss tst ttf tti ttl ttm tts ttt