sox spa spb spe spl spn spo spp spr sps spt spx sr- sra srb sre srl srn sro srp srr srs srt srx ss- ssa ssb sse ssl ssn sso ssp ssr sss sst ssx sta stb ste stl stn sto stp str sts stt stx sxl sxn sxs sxt t-x taa tab tae tal tan tao tap tar tas tat tax tba tbb tbe tbl tbn tbo tbp tbr tbs tbt te- tea teb tee tel ten teo tep ter tes tet tex tla tle tll tln tlo tlp tlr tls tlt tlx tna tnb tne tnl tnn tno tnp tnr tns tnt tnx to- toa tob toe tol ton too top tor tos tot tox tpa tpb tpe tpl tpn tpo tpp tpr tps tpt tpx tra trb tre trl trn tro trp trr trs trt trx tsa tsb tse tsl tsn tso tsp tsr tss tst tsx tta ttb tte ttl ttn tto ttp ttr tts ttt ttx txe txl txn txs txt xaa xal xan xap xar xas xat xbe xbl xbr xbx xee xel xen xep xer xes xet xex xla xlb xlr xls xlt xna xno xns xoa xon xoo xop xor xos xot xox xpa xpb xpe xpl xpn xpo xpp xps xpt xrt xrx xsa xsb xsl xsp xss xst xtp xtr xts xtx xxl xxo xxp xxx