fff ffg ffi ffn ffs fft fgf fgg fgi fgn fgs fgt fif fig fii fin fis fit fnf fng fni fnn fns fnt fsf fsg fsi fsn fss fst ftf ftg fti ftn fts ftt gff gfi gfs gft ggg ggi ggn ggs ggt gif gig gii gin gis git gnf gni gnn gns gnt gsf gsg gsi gsn gss gst gtf gtg gti gtn gts gtt i-f iff ifg ifi ifn ifs ift igf igg igi ign igs igt iif iii iin iis iit in- inf ing ini inn ins int is- isf isg isi isn iss ist itf itg iti itn its itt n-i nff nfi nfn nfs nft ngf ngg ngi ngn ngs ngt nif nig nii nin nis nit nnf nng nni nnn nns nnt nsf nsg nsi nsn nss nst ntf ntg nti ntn nts ntt sff sfg sfi sfn sfs sft sgf sgg sgi sgn sgs sgt sif sig sii sin sis sit snf sng sni snn sns snt ss- ssf ssg ssi ssn sss sst stf stg sti stn sts stt tff tfg tfi tfn tfs tft tgf tgg tgi tgn tgs tgt tif tig tii tin tis tit tnf tng tni tnn tns tnt tsf tsg tsi tsn tss tst ttf ttg tti ttn tts ttt