srd srg sri srm sro srp srr srs srt sry ss- ssc ssd ssg ssi ssm sso ssp ssr sss sst stc std stg sti stm sto stp str sts stt sty sy- syc syd syg syi sym syp syr sys syt tcc tcd tcg tci tcm tco tcp tcr tcs tct tdc tdd tdg tdi tdm tdo tdp tdr tds tdt tdy tgc tgg tgi tgm tgo tgp tgr tgs tgt tgy tic tid tig tii tim tio tip tir tis tit tiy tmc tmd tmg tmi tmm tmo tmp tmr tms tmt tmy to- toc tod tog toi tom too top tor tos tot toy tpc tpd tpg tpi tpm tpo tpp tpr tps tpt trc trd trg tri trm tro trp trr trs trt try tsc tsd tsg tsi tsm tso tsp tsr tss tst tsy ttc ttd ttg tti ttm tto ttp ttr tts ttt tty tyc tyd tyg tym tyo typ tyr tys tyt ycc ycd yci yco ycp ycs ycy ydg ydo yds ydt ydy ygc ygm ygo yid yig yii yim yio yip yir yis yit ymc ymg ymi ymm ymo yms ymt yoc yod yog yoi yom yoo yop yor yos yot yoy ypd ypg ypo yps yrc yrg yro yrp yrs yrt ysc ysg ysi ysm yso ysp ysr yss yst ysy ytc ytd ytm yto ytp ytr yts ytt yyc yyg yys yyt yyy