fff ffg ffi ffl ffs fft fgf fgg fgi fgl fgs fgt fif fig fii fil fis fit flf flg fli fll fls flt fsf fsg fsi fsl fss fst ftf ftg fti ftl fts ftt gff gfi gfl gfs gft ggg ggi ggs ggt gif gig gii gil gis git glf glg gli gll gls glt gsf gsg gsi gsl gss gst gtf gtg gti gtl gts gtt i-f iff ifg ifi ifl ifs ift igf igg igi igl igs igt iif iii iil iis iit il- ilf ilg ili ill ils ilt is- isf isg isi isl iss ist itf itg iti itl its itt lff lfg lfi lfl lfs lft lgf lgg lgi lgl lgs lgt lif lig lii lil lis lit llf llg lli lll lls llt lsf lsg lsi lsl lss lst ltf ltg lti ltl lts ltt sff sfg sfi sfl sfs sft sgf sgg sgi sgl sgs sgt sif sig sii sil sis sit slf slg sli sll sls slt ss- ssf ssg ssi ssl sss sst stf stg sti stl sts stt tff tfg tfi tfl tfs tft tgf tgg tgi tgl tgs tgt tif tig tii til tis tit tlf tlg tli tll tls tlt tsf tsg tsi tsl tss tst ttf ttg tti ttl tts ttt