sic sid sie sii sil sio sir sis sit six sla slc sld sle sli sll slo slr sls slt slx soa soc sod soe soi sol soo sor sos sot sox sr- sra src srd sre sri srl sro srr srs srt srx ss- ssa ssc ssd sse ssi ssl sso ssr sss sst ssx sta stc std ste sti stl sto str sts stt stx sxc sxi sxl sxs sxt t-x taa tac tad tae tai tal tao tar tas tat tax tca tcc tcd tce tci tcl tco tcr tcs tct tcx tda tdc tdd tde tdi tdl tdo tdr tds tdt tdx te- tea tec ted tee tei tel teo ter tes tet tex tia tic tid tie tii til tio tir tis tit tix tla tlc tld tle tli tll tlo tlr tls tlt tlx to- toa toc tod toe toi tol too tor tos tot tox tra trc trd tre tri trl tro trr trs trt trx tsa tsc tsd tse tsi tsl tso tsr tss tst tsx tta ttc ttd tte tti ttl tto ttr tts ttt ttx txe txi txl txs txt xaa xac xad xal xar xas xat xcd xci xcl xcr xcx xda xdc xde xdi xdr xds xdt xed xee xel xer xes xet xex xia xic xie xii xio xis xit xix xla xld xli xlr xls xlt xoa xoc xod xoi xoo xor xos xot xox xrc xrd xrt xrx xsa xsc xsi xsl xss xst xtc xti xtr xts xtx xxi xxl xxo xxx