sir sis sit sr- srb src srd sre srg srh sri srr srs srt sry ss- ssb ssc ssd sse ssg ssh ssi ssr sss sst stb stc std ste stg sth sti str sts stt sty sy- syb syc syd sye syg syh syi syr sys syt tbb tbc tbd tbe tbg tbh tbi tbr tbs tbt tcb tcc tcd tce tcg tch tci tcr tcs tct tdb tdc tdd tde tdg tdh tdi tdr tds tdt tdy te- teb tec ted tee teg teh tei ter tes tet tey tgb tgc tge tgg tgh tgi tgr tgs tgt tgy th- thb thc thd the thg thh thi thr ths tht thy tib tic tid tie tig tih tii tir tis tit tiy trb trc trd tre trg trh tri trr trs trt try tsb tsc tsd tse tsg tsh tsi tsr tss tst tsy ttb ttc ttd tte ttg tth tti ttr tts ttt tty tyc tyd tye tyg tyr tys tyt ybc ybe ybg ybi ybr ybs yby ycc ycd yce ych yci ycs ycy yde ydg yds ydt ydy yeb yec yed yee yeg yeh yei yer yes yet yey ygc yhc yhe yhi yhs yht yid yie yig yih yii yir yis yit yrc yre yrg yrs yrt ysb ysc yse ysg ysi ysr yss yst ysy ytc ytd yte yth ytr yts ytt yyb yyc yye yyg yys yyt yyy