sna sne snf sni snl snn sno snp sns snt soa soe sof soi sol son soo sop sos sot sox spa spe spf spi spl spn spo spp sps spt spx ss- ssa sse ssf ssi ssl ssn sso ssp sss sst ssx sta ste stf sti stl stn sto stp sts stt stx sxi sxl sxn sxs sxt t-x taa tae taf tai tal tan tao tap tas tat tax te- tea tee tef tei tel ten teo tep tes tet tex tfa tfe tff tfi tfl tfn tfo tfp tfs tft tfx tia tie tif tii til tin tio tip tis tit tix tla tle tlf tli tll tln tlo tlp tls tlt tlx tna tne tnf tni tnl tnn tno tnp tns tnt tnx to- toa toe tof toi tol ton too top tos tot tox tpa tpe tpf tpi tpl tpn tpo tpp tps tpt tpx tsa tse tsf tsi tsl tsn tso tsp tss tst tsx tta tte ttf tti ttl ttn tto ttp tts ttt ttx txe txf txi txl txn txs txt xaa xaf xal xan xap xas xat xee xel xen xep xes xet xex xfa xfe xfl xfn xfs xft xfx xia xie xii xin xio xis xit xix xla xlf xli xls xlt xna xno xns xoa xof xoi xon xoo xop xos xot xox xpa xpe xpf xpl xpn xpo xpp xps xpt xsa xsi xsl xsp xss xst xtf xti xtp xts xtx xxi xxl xxo xxp xxx