-th fff ffh ffi ffs fft ffx fhf fhh fhi fhs fif fih fii fis fit fix fsf fsh fsi fss fst fsx ftf fth fti fts ftt ftx fxi fxs fxt fxx h-i hff hfh hfi hfs hft hhf hhh hhi hhs hht hif hih hii his hit hix hsf hsh hsi hss hst hsx htf hth hti hts htt htx i-f iff ifi ifs ift ifx ihf ihh ihi ihs iht iif iih iii iis iit iix is- isf ish isi iss ist itf ith iti its itt itx ixi sff sfh sfi sfs sft sfx sh- shf shh shi shs sht sif sih sii sis sit six ss- ssf ssh ssi sss sst ssx stf sth sti sts stt stx sxi sxs sxt t-x tff tfh tfi tfs tft tfx th- thf thh thi ths tht thx tif tih tii tis tit tix tsf tsh tsi tss tst tsx ttf tth tti tts ttt ttx txf txi txs txt xfh xfs xft xfx xht xii xis xit xix xsi xss xst xtf xti xts xtx xxi xxx