sr- sra src srd sre srg srh sri srl srn sro srr srs srt ss- ssa ssc ssd sse ssg ssh ssi ssl ssn sso ssr sss sst sta stc std ste stg sth sti stl stn sto str sts stt taa tac tad tae tag tah tai tal tan tao tar tas tat tca tcc tcd tce tcg tch tci tcl tcn tco tcr tcs tct tda tdc tdd tde tdg tdh tdi tdl tdn tdo tdr tds tdt te- tea tec ted tee teg teh tei tel ten teo ter tes tet tga tgc tge tgg tgh tgi tgl tgn tgo tgr tgs tgt th- tha thc thd the thg thh thi thl thn tho thr ths tht tia tic tid tie tig tih tii til tin tio tir tis tit tla tlc tld tle tlg tlh tli tll tln tlo tlr tls tlt tna tnc tnd tne tng tnh tni tnl tnn tno tnr tns tnt to- toa toc tod toe tog toh toi tol ton too tor tos tot tra trc trd tre trg trh tri trl trn tro trr trs trt tsa tsc tsd tse tsg tsh tsi tsl tsn tso tsr tss tst tta ttc ttd tte ttg tth tti ttl ttn tto ttr tts ttt