sir sis sit six sla slb slc sle sli sll slo slr sls slt slx soa sob soc soe soi sol soo sor sos sot sox sr- sra srb src sre sri srl sro srr srs srt srx ss- ssa ssb ssc sse ssi ssl sso ssr sss sst ssx sta stb stc ste sti stl sto str sts stt stx sxc sxi sxl sxs sxt t-x taa tab tac tae tai tal tao tar tas tat tax tba tbb tbc tbe tbi tbl tbo tbr tbs tbt tca tcb tcc tce tci tcl tco tcr tcs tct tcx te- tea teb tec tee tei tel teo ter tes tet tex tia tib tic tie tii til tio tir tis tit tix tla tlc tle tli tll tlo tlr tls tlt tlx to- toa tob toc toe toi tol too tor tos tot tox tra trb trc tre tri trl tro trr trs trt trx tsa tsb tsc tse tsi tsl tso tsr tss tst tsx tta ttb ttc tte tti ttl tto ttr tts ttt ttx txe txi txl txs txt xaa xac xal xar xas xat xbc xbe xbl xbr xbx xcb xci xcl xcr xcx xee xel xer xes xet xex xia xic xie xii xio xis xit xix xla xlb xli xlr xls xlt xoa xoc xoi xoo xor xos xot xox xrc xrt xrx xsa xsb xsc xsi xsl xss xst xtc xti xtr xts xtx xxi xxl xxo xxx