-th fff ffh ffi ffs fft fhf fhh fhi fhs fif fih fii fis fit fsf fsh fsi fss fst ftf fth fti fts ftt h-i hff hfh hfi hfs hft hhf hhh hhi hhs hht hif hih hii his hit hsf hsh hsi hss hst htf hth hti hts htt i-f iff ifi ifs ift ihf ihh ihi ihs iht iif iih iii iis iit is- isf ish isi iss ist itf ith iti its itt sff sfh sfi sfs sft sh- shf shh shi shs sht sif sih sii sis sit ss- ssf ssh ssi sss sst stf sth sti sts stt tff tfh tfi tfs tft th- thf thh thi ths tht tif tih tii tis tit tsf tsh tsi tss tst ttf tth tti tts ttt