sll slp slr sls slt sly spb spc spd spe spi spl spp spr sps spt spy sr- srb src srd sre sri srl srp srr srs srt sry ss- ssb ssc ssd sse ssi ssl ssp ssr sss sst stb stc std ste sti stl stp str sts stt sty sy- syb syc syd sye syi syl syp syr sys syt tbb tbc tbd tbe tbi tbl tbp tbr tbs tbt tcb tcc tcd tce tci tcl tcp tcr tcs tct tdb tdc tdd tde tdi tdl tdp tdr tds tdt tdy te- teb tec ted tee tei tel tep ter tes tet tey tib tic tid tie tii til tip tir tis tit tiy tlc tld tle tli tll tlp tlr tls tlt tpb tpc tpd tpe tpi tpl tpp tpr tps tpt trb trc trd tre tri trl trp trr trs trt try tsb tsc tsd tse tsi tsl tsp tsr tss tst tsy ttb ttc ttd tte tti ttl ttp ttr tts ttt tty tyc tyd tye tyl typ tyr tys tyt ybc ybe ybi ybl ybp ybr ybs yby ycc ycd yce yci ycl ycp ycs ycy yde ydl yds ydt ydy yeb yec yed yee yei yel yep yer yes yet yey yid yie yii yip yir yis yit ylc yld yle yli yll ylr yls ylt yly ypd ypl yps yrc yre yrp yrs yrt ysb ysc yse ysi ysl ysp ysr yss yst ysy ytc ytd yte ytl ytp ytr yts ytt yyb yyc yye yys yyt yyy