sop sos sot sox spa spc spe spg sph spn spo spp sps spt spx ss- ssa ssc sse ssg ssh ssn sso ssp sss sst ssx sta stc ste stg sth stn sto stp sts stt stx sxc sxn sxs sxt t-x taa tac tae tag tah tan tao tap tas tat tax tca tcc tce tcg tch tcn tco tcp tcs tct tcx te- tea tec tee teg teh ten teo tep tes tet tex tga tgc tge tgg tgh tgn tgo tgp tgs tgt th- tha thc the thg thh thn tho thp ths tht thx tna tnc tne tng tnh tnn tno tnp tns tnt tnx to- toa toc toe tog toh ton too top tos tot tox tpa tpc tpe tpg tph tpn tpo tpp tps tpt tpx tsa tsc tse tsg tsh tsn tso tsp tss tst tsx tta ttc tte ttg tth ttn tto ttp tts ttt ttx txe txn txs txt xaa xac xag xan xap xas xat xch xcp xcx xee xeg xen xep xes xet xex xge xgp xhp xht xna xnc xno xns xoa xoc xog xon xoo xop xos xot xox xpa xpc xpe xpg xpn xpo xpp xps xpt xsa xsc xsp xss xst xtc xtp xts xtx xxo xxp xxx