soa sod soe soi son soo sop sor sos sot sox spa spd spe spi spn spo spp spr sps spt spx sr- sra srd sre sri srn sro srp srr srs srt srx ss- ssa ssd sse ssi ssn sso ssp ssr sss sst ssx sta std ste sti stn sto stp str sts stt stx sxi sxn sxs sxt t-x taa tad tae tai tan tao tap tar tas tat tax tda tdd tde tdi tdn tdo tdp tdr tds tdt tdx te- tea ted tee tei ten teo tep ter tes tet tex tia tid tie tii tin tio tip tir tis tit tix tna tnd tne tni tnn tno tnp tnr tns tnt tnx to- toa tod toe toi ton too top tor tos tot tox tpa tpd tpe tpi tpn tpo tpp tpr tps tpt tpx tra trd tre tri trn tro trp trr trs trt trx tsa tsd tse tsi tsn tso tsp tsr tss tst tsx tta ttd tte tti ttn tto ttp ttr tts ttt ttx txe txi txn txs txt xaa xad xan xap xar xas xat xda xde xdi xdr xds xdt xed xee xen xep xer xes xet xex xia xie xii xin xio xis xit xix xna xno xns xoa xod xoi xon xoo xop xor xos xot xox xpa xpd xpe xpn xpo xpp xps xpt xrd xrt xrx xsa xsi xsp xss xst xti xtp xtr xts xtx xxi xxo xxp xxx