srf sri srm srn sro srr srs srt sry ss- ssc ssd ssf ssi ssm ssn sso ssr sss sst stc std stf sti stm stn sto str sts stt sty sy- syc syd syi sym syn syr sys syt tcc tcd tcf tci tcm tcn tco tcr tcs tct tdc tdd tdf tdi tdm tdn tdo tdr tds tdt tdy tfc tfd tff tfi tfm tfn tfo tfr tfs tft tic tid tif tii tim tin tio tir tis tit tiy tmc tmd tmf tmi tmm tmn tmo tmr tms tmt tmy tnc tnd tnf tni tnm tnn tno tnr tns tnt to- toc tod tof toi tom ton too tor tos tot toy trc trd trf tri trm trn tro trr trs trt try tsc tsd tsf tsi tsm tsn tso tsr tss tst tsy ttc ttd ttf tti ttm ttn tto ttr tts ttt tty tyc tyd tyf tym tyn tyo tyr tys tyt ycc ycd ycf yci yco ycs ycy ydn ydo yds ydt ydy yfc yfd yff yfm yfr yfs yft yid yif yii yim yin yio yir yis yit ymc ymi ymm ymo yms ymt ynd ynn yns yny yoc yod yof yoi yom yon yoo yor yos yot yoy yrc yrf yrn yro yrs yrt ysc ysi ysm yso ysr yss yst ysy ytc ytd ytf ytm ytn yto ytr yts ytt yyc yyf yys yyt yyy