-th h-i hhh hhi hhm hhs hht hih hii him his hit hix hmh hmi hmm hms hmt hmx hsh hsi hsm hss hst hsx hth hti htm hts htt htx hxm ihh ihi ihm ihs iht iih iii iim iis iit iix im- imh imi imm ims imt imx is- ish isi ism iss ist ith iti itm its itt itx ixi mhh mhi mhm mhs mht mhx mi- mih mii mim mis mit mix mmh mmi mmm mms mmt mmx msh msi msm mss mst msx mth mti mtm mts mtt mtx mxi mxs sh- shh shi shm shs sht sih sii sim sis sit six smh smi smm sms smt smx ss- ssh ssi ssm sss sst ssx sth sti stm sts stt stx sxi sxm sxs sxt t-x th- thh thi thm ths tht thx tih tii tim tis tit tix tmh tmi tmm tms tmt tmx tsh tsi tsm tss tst tsx tth tti ttm tts ttt ttx txi txs txt xht xii xis xit xix xmh xmi xmm xms xmt xmx xsi xsm xss xst xti xtm xts xtx xxi xxx