sid sie sif sii sin sir sis sit six sna snc snd sne snf sni snn snr sns snt sr- sra src srd sre srf sri srn srr srs srt srx ss- ssa ssc ssd sse ssf ssi ssn ssr sss sst ssx sta stc std ste stf sti stn str sts stt stx sxc sxi sxn sxs sxt t-x taa tac tad tae taf tai tan tar tas tat tax tca tcc tcd tce tcf tci tcn tcr tcs tct tcx tda tdc tdd tde tdf tdi tdn tdr tds tdt tdx te- tea tec ted tee tef tei ten ter tes tet tex tfa tfc tfd tfe tff tfi tfn tfr tfs tft tfx tia tic tid tie tif tii tin tir tis tit tix tna tnc tnd tne tnf tni tnn tnr tns tnt tnx tra trc trd tre trf tri trn trr trs trt trx tsa tsc tsd tse tsf tsi tsn tsr tss tst tsx tta ttc ttd tte ttf tti ttn ttr tts ttt ttx txe txf txi txn txs txt xaa xac xad xaf xan xar xas xat xcd xcf xci xcr xcx xda xdc xde xdf xdi xdr xds xdt xed xee xen xer xes xet xex xfa xfe xfn xfs xft xfx xia xic xie xii xin xis xit xix xna xnc xns xrc xrd xrf xrt xrx xsa xsc xsi xss xst xtc xtf xti xtr xts xtx xxi xxx