fff ffg ffi ffr ffs fft fgf fgg fgi fgr fgs fgt fif fig fii fir fis fit frf frg fri frr frs frt fsf fsg fsi fsr fss fst ftf ftg fti ftr fts ftt gff gfi gfr gfs gft ggg ggi ggr ggs ggt gif gig gii gir gis git grf grg gri grr grs grt gsf gsg gsi gsr gss gst gtf gtg gti gtr gts gtt i-f iff ifg ifi ifr ifs ift igf igg igi igr igs igt iif iii iir iis iit ir- irf irg iri irr irs irt is- isf isg isi isr iss ist itf itg iti its itt rff rfg rfi rfr rfs rft rgf rgg rgi rgr rgs rgt rif rig rii rir ris rit rrf rrg rri rrr rrs rrt rsf rsg rsi rsr rss rst rtf rtg rti rtr rts rtt sff sfg sfi sfr sfs sft sgf sgg sgi sgr sgs sgt sif sig sii sir sis sit sr- srf srg sri srr srs srt ss- ssf ssg ssi ssr sss sst stf stg sti str sts stt tff tfg tfi tfr tfs tft tgf tgg tgi tgr tgs tgt tif tig tii tir tis tit trf trg tri trr trs trt tsf tsg tsi tsr tss tst ttf ttg tti ttr tts ttt