fff ffg ffi ffl ffs fgf fgg fgi fgl fgs fif fig fii fil fis flf flg fli fll fls fsf fsg fsi fsl fss gff gfi gfl gfs ggg ggi ggs gif gig gii gil gis glf glg gli gll gls gsf gsg gsi gsl gss i-f iff ifg ifi ifl ifs igf igg igi igl igs iif iii iil iis il- ilf ilg ili ill ils is- isf isg isi isl iss lff lfg lfi lfl lfs lgf lgg lgi lgl lgs lif lig lii lil lis llf llg lli lll lls lsf lsg lsi lsl lss sff sfg sfi sfl sfs sgf sgg sgi sgl sgs sif sig sii sil sis slf slg sli sll sls ss- ssf ssg ssi ssl sss