six sla sld sle sli sll slm slo slp sls slt slx sma smd sme smi sml smm smo smp sms smt smx soa sod soe soi sol som soo sop sos sot sox spa spd spe spi spl spm spo spp sps spt spx ss- ssa ssd sse ssi ssl ssm sso ssp sss sst ssx sta std ste sti stl stm sto stp sts stt stx sxi sxl sxm sxs sxt t-x taa tad tae tai tal tam tao tap tas tat tax tda tdd tde tdi tdl tdm tdo tdp tds tdt tdx te- tea ted tee tei tel tem teo tep tes tet tex tia tid tie tii til tim tio tip tis tit tix tla tld tle tli tll tlm tlo tlp tls tlt tlx tma tmd tme tmi tml tmm tmo tmp tms tmt tmx to- toa tod toe toi tol tom too top tos tot tox tpa tpd tpe tpi tpl tpm tpo tpp tps tpt tpx tsa tsd tse tsi tsl tsm tso tsp tss tst tsx tta ttd tte tti ttl ttm tto ttp tts ttt ttx txe txi txl txs txt xaa xad xal xam xap xas xat xda xde xdi xdm xds xdt xed xee xel xem xep xes xet xex xia xie xii xio xis xit xix xla xld xli xlm xls xlt xma xmd xmi xml xmm xmo xmp xms xmt xmx xoa xod xoi xom xoo xop xos xot xox xpa xpd xpe xpl xpm xpo xpp xps xpt xsa xsi xsl xsm xsp xss xst xti xtm xtp xts xtx xxi xxl xxo xxp xxx