soc sod soe sog soi sol son soo sop sor sos sot spa spc spd spe spg spi spl spn spo spp spr sps spt sr- sra src srd sre srg sri srl srn sro srp srr srs srt ss- ssa ssc ssd sse ssg ssi ssl ssn sso ssp ssr sss sst sta stc std ste stg sti stl stn sto stp str sts stt taa tac tad tae tag tai tal tan tao tap tar tas tat tca tcc tcd tce tcg tci tcl tcn tco tcp tcr tcs tct tda tdc tdd tde tdg tdi tdl tdn tdo tdp tdr tds tdt te- tea tec ted tee teg tei tel ten teo tep ter tes tet tga tgc tge tgg tgi tgl tgn tgo tgp tgr tgs tgt tia tic tid tie tig tii til tin tio tip tir tis tit tla tlc tld tle tlg tli tll tln tlo tlp tlr tls tlt tna tnc tnd tne tng tni tnl tnn tno tnp tnr tns tnt to- toa toc tod toe tog toi tol ton too top tor tos tot tpa tpc tpd tpe tpg tpi tpl tpn tpo tpp tpr tps tpt tra trc trd tre trg tri trl trn tro trp trr trs trt tsa tsc tsd tse tsg tsi tsl tsn tso tsp tsr tss tst tta ttc ttd tte ttg tti ttl ttn tto ttp ttr tts ttt