-th h-i hhh hhi hhs hht hih hii his hit hix hsh hsi hss hst hsx hth hti hts htt htx ihh ihi ihs iht iih iii iis iit iix is- ish isi iss ist ith iti its itt itx ixi sh- shh shi shs sht sih sii sis sit six ss- ssh ssi sss sst ssx sth sti sts stt stx sxi sxs sxt t-x th- thh thi ths tht thx tih tii tis tit tix tsh tsi tss tst tsx tth tti tts ttt ttx txi txs txt xht xii xis xit xix xsi xss xst xti xts xtx xxi xxx