spe spi spl spm spp spr sps spt spy sr- srb src sre sri srl srm srp srr srs srt sry ss- ssb ssc sse ssi ssl ssm ssp ssr sss sst stb stc ste sti stl stm stp str sts stt sty sy- syb syc sye syi syl sym syp syr sys syt tbb tbc tbe tbi tbl tbm tbp tbr tbs tbt tcb tcc tce tci tcl tcm tcp tcr tcs tct te- teb tec tee tei tel tem tep ter tes tet tey tib tic tie tii til tim tip tir tis tit tiy tlc tle tli tll tlm tlp tlr tls tlt tmb tmc tme tmi tml tmm tmp tmr tms tmt tmy tpb tpc tpe tpi tpl tpm tpp tpr tps tpt trb trc tre tri trl trm trp trr trs trt try tsb tsc tse tsi tsl tsm tsp tsr tss tst tsy ttb ttc tte tti ttl ttm ttp ttr tts ttt tty tyc tye tyl tym typ tyr tys tyt ybc ybe ybi ybl ybm ybp ybr ybs yby ycc yce yci ycl ycp ycs ycy yeb yec yee yei yel yem yep yer yes yet yey yie yii yim yip yir yis yit ylc yle yli yll ylm ylr yls ylt yly ymc yme ymi yml ymm yms ymt ypl yps yrc yre yrp yrs yrt ysb ysc yse ysi ysl ysm ysp ysr yss yst ysy ytc yte ytl ytm ytp ytr yts ytt yyb yyc yye yys yyt yyy