spt spy sr- src srd srh sri srl sro srp srr srs srt sry ss- ssc ssd ssh ssi ssl sso ssp ssr sss sst stc std sth sti stl sto stp str sts stt sty sy- syc syd syh syi syl syp syr sys syt tcc tcd tch tci tcl tco tcp tcr tcs tct tdc tdd tdh tdi tdl tdo tdp tdr tds tdt tdy th- thc thd thh thi thl tho thp thr ths tht thy tic tid tih tii til tio tip tir tis tit tiy tlc tld tlh tli tll tlo tlp tlr tls tlt to- toc tod toh toi tol too top tor tos tot toy tpc tpd tph tpi tpl tpo tpp tpr tps tpt trc trd trh tri trl tro trp trr trs trt try tsc tsd tsh tsi tsl tso tsp tsr tss tst tsy ttc ttd tth tti ttl tto ttp ttr tts ttt tty tyc tyd tyl tyo typ tyr tys tyt ycc ycd ych yci ycl yco ycp ycs ycy ydl ydo yds ydt ydy yhc yhi yhs yht yid yih yii yio yip yir yis yit ylc yld yli yll ylr yls ylt yly yoc yod yoi yol yoo yop yor yos yot yoy ypd ypl ypo yps yrc yro yrp yrs yrt ysc ysi ysl yso ysp ysr yss yst ysy ytc ytd yth ytl yto ytp ytr yts ytt yyc yys yyt yyy