fff ffi ffl ffm ffs fif fii fil fim fis flf fli fll flm fls fmf fmi fml fmm fms fsf fsi fsl fsm fss i-f iff ifi ifl ifm ifs iif iii iil iim iis il- ilf ili ill ilm ils im- imf imi iml imm ims is- isf isi isl ism iss lff lfi lfl lfm lfs lif lii lil lim lis llf lli lll llm lls lmf lmi lml lmm lms lsf lsi lsl lsm lss m-f mff mfi mfl mfm mfs mi- mif mii mil mim mis mlf mli mll mlm mls mmf mmi mml mmm mms msf msi msl msm mss sff sfi sfl sfm sfs sif sii sil sim sis slf sli sll slm sls smf smi sml smm sms ss- ssf ssi ssl ssm sss