fff ffg ffi ffl ffr ffs fft fgf fgg fgi fgl fgr fgs fgt fif fig fii fil fir fis fit flf flg fli fll flr fls flt frf frg fri frl frr frs frt fsf fsg fsi fsl fsr fss fst ftf ftg fti ftl ftr fts ftt gff gfi gfl gfr gfs gft ggg ggi ggr ggs ggt gif gig gii gil gir gis git glf glg gli gll glr gls glt grf grg gri grl grr grs grt gsf gsg gsi gsl gsr gss gst gtf gtg gti gtl gtr gts gtt i-f iff ifg ifi ifl ifr ifs ift igf igg igi igl igr igs igt iif iii iil iir iis iit il- ilf ilg ili ill ilr ils ilt ir- irf irg iri irl irr irs irt is- isf isg isi isl isr iss ist itf itg iti itl its itt lff lfg lfi lfl lfr lfs lft lgf lgg lgi lgl lgr lgs lgt lif lig lii lil lir lis lit llf llg lli lll llr lls llt lrf lrg lri lrr lrs lrt lsf lsg lsi lsl lsr lss lst ltf ltg lti ltl ltr lts ltt rff rfg rfi rfl rfr rfs rft rgf rgg rgi rgr rgs rgt rif rig rii ril rir ris rit rlf rlg rli rll rlr rls rlt rrf rrg rri rrl rrr rrs rrt rsf rsg rsi rsl rsr rss rst rtf rtg rti rtl rtr rts rtt sff sfg sfi sfl sfr sfs sft sgf sgg sgi sgl sgr sgs sgt sif sig sii sil sir sis sit slf slg sli sll slr sls slt sr- srf srg sri srl srr srs srt ss- ssf ssg ssi ssl ssr sss sst stf stg sti stl str sts stt tff tfg tfi tfl tfr tfs tft tgf tgg tgi tgl tgr tgs tgt tif tig tii til tir tis tit tlf tlg tli tll tlr tls tlt trf trg tri trl trr trs trt tsf tsg tsi tsl tsr tss tst ttf ttg tti ttl ttr tts ttt