spe spi spl spm spo spp spr sps spt spy sr- srb sre sri srl srm sro srp srr srs srt sry ss- ssb sse ssi ssl ssm sso ssp ssr sss sst stb ste sti stl stm sto stp str sts stt sty sy- syb sye syi syl sym syp syr sys syt tbb tbe tbi tbl tbm tbo tbp tbr tbs tbt te- teb tee tei tel tem teo tep ter tes tet tey tib tie tii til tim tio tip tir tis tit tiy tle tli tll tlm tlo tlp tlr tls tlt tmb tme tmi tml tmm tmo tmp tmr tms tmt tmy to- tob toe toi tol tom too top tor tos tot toy tpb tpe tpi tpl tpm tpo tpp tpr tps tpt trb tre tri trl trm tro trp trr trs trt try tsb tse tsi tsl tsm tso tsp tsr tss tst tsy ttb tte tti ttl ttm tto ttp ttr tts ttt tty tye tyl tym tyo typ tyr tys tyt ybe ybi ybl ybm ybp ybr ybs yby yeb yee yei yel yem yeo yep yer yes yet yey yie yii yim yio yip yir yis yit yle yli yll ylm ylr yls ylt yly yme ymi yml ymm ymo yms ymt yob yoe yoi yol yom yoo yop yor yos yot yoy ypl ypo yps yre yro yrp yrs yrt ysb yse ysi ysl ysm yso ysp ysr yss yst ysy yte ytl ytm yto ytp ytr yts ytt yyb yye yys yyt yyy