six sna snc sne sng sni snn sno snp sns snt soa soc soe sog soi son soo sop sos sot sox spa spc spe spg spi spn spo spp sps spt spx ss- ssa ssc sse ssg ssi ssn sso ssp sss sst ssx sta stc ste stg sti stn sto stp sts stt stx sxc sxi sxn sxs sxt t-x taa tac tae tag tai tan tao tap tas tat tax tca tcc tce tcg tci tcn tco tcp tcs tct tcx te- tea tec tee teg tei ten teo tep tes tet tex tga tgc tge tgg tgi tgn tgo tgp tgs tgt tia tic tie tig tii tin tio tip tis tit tix tna tnc tne tng tni tnn tno tnp tns tnt tnx to- toa toc toe tog toi ton too top tos tot tox tpa tpc tpe tpg tpi tpn tpo tpp tps tpt tpx tsa tsc tse tsg tsi tsn tso tsp tss tst tsx tta ttc tte ttg tti ttn tto ttp tts ttt ttx txe txi txn txs txt xaa xac xag xan xap xas xat xci xcp xcx xee xeg xen xep xes xet xex xge xgi xgp xia xic xie xii xin xio xis xit xix xna xnc xno xns xoa xoc xog xoi xon xoo xop xos xot xox xpa xpc xpe xpg xpn xpo xpp xps xpt xsa xsc xsi xsp xss xst xtc xti xtp xts xtx xxi xxo xxp xxx