fff ffg ffl ffs fft ffu fgf fgg fgl fgs fgt flf flg fll fls flt flu fsf fsg fsl fss fst fsu ftf ftg ftl fts ftt ftu fuf fug ful fus fut fuu gff gfl gfs gft ggg ggs ggt ggu glf glg gll gls glt glu gsf gsg gsl gss gst gsu gtf gtg gtl gts gtt gtu gu- guf gug gul gus gut guu lff lfg lfl lfs lft lfu lgf lgg lgl lgs lgt lgu llf llg lll lls llt llu lsf lsg lsl lss lst lsu ltf ltg ltl lts ltt ltu luf lug lul lus lut luu sff sfg sfl sfs sft sfu sgf sgg sgl sgs sgt sgu slf slg sll sls slt slu ss- ssf ssg ssl sss sst ssu stf stg stl sts stt stu suf sug sul sus sut suu tff tfg tfl tfs tft tfu tgf tgg tgl tgs tgt tgu tlf tlg tll tls tlt tlu tsf tsg tsl tss tst tsu ttf ttg ttl tts ttt ttu tuf tug tul tus tut tuu uff ufg ufl ufs uft ufu ugf ugg ugl ugs ugt ugu ulf ulg ull uls ult ulu usf usg usl uss ust usu utf utl uts utt utu uug uus uut uuu