sna snc sne sni snn sno snp snr sns snt soa soc soe soi son soo sop sor sos sot sox spa spc spe spi spn spo spp spr sps spt spx sr- sra src sre sri srn sro srp srr srs srt srx ss- ssa ssc sse ssi ssn sso ssp ssr sss sst ssx sta stc ste sti stn sto stp str sts stt stx sxc sxi sxn sxs sxt t-x taa tac tae tai tan tao tap tar tas tat tax tca tcc tce tci tcn tco tcp tcr tcs tct tcx te- tea tec tee tei ten teo tep ter tes tet tex tia tic tie tii tin tio tip tir tis tit tix tna tnc tne tni tnn tno tnp tnr tns tnt tnx to- toa toc toe toi ton too top tor tos tot tox tpa tpc tpe tpi tpn tpo tpp tpr tps tpt tpx tra trc tre tri trn tro trp trr trs trt trx tsa tsc tse tsi tsn tso tsp tsr tss tst tsx tta ttc tte tti ttn tto ttp ttr tts ttt ttx txe txi txn txs txt xaa xac xan xap xar xas xat xci xcp xcr xcx xee xen xep xer xes xet xex xia xic xie xii xin xio xis xit xix xna xnc xno xns xoa xoc xoi xon xoo xop xor xos xot xox xpa xpc xpe xpn xpo xpp xps xpt xrc xrt xrx xsa xsc xsi xsp xss xst xtc xti xtp xtr xts xtx xxi xxo xxp xxx