sop sor sos sot soy spb spc spe spi spm spo spp spr sps spt spy sr- srb src sre sri srm sro srp srr srs srt sry ss- ssb ssc sse ssi ssm sso ssp ssr sss sst stb stc ste sti stm sto stp str sts stt sty sy- syb syc sye syi sym syp syr sys syt tbb tbc tbe tbi tbm tbo tbp tbr tbs tbt tcb tcc tce tci tcm tco tcp tcr tcs tct te- teb tec tee tei tem teo tep ter tes tet tey tib tic tie tii tim tio tip tir tis tit tiy tmb tmc tme tmi tmm tmo tmp tmr tms tmt tmy to- tob toc toe toi tom too top tor tos tot toy tpb tpc tpe tpi tpm tpo tpp tpr tps tpt trb trc tre tri trm tro trp trr trs trt try tsb tsc tse tsi tsm tso tsp tsr tss tst tsy ttb ttc tte tti ttm tto ttp ttr tts ttt tty tyc tye tym tyo typ tyr tys tyt ybc ybe ybi ybm ybp ybr ybs yby ycc yce yci yco ycp ycs ycy yeb yec yee yei yem yeo yep yer yes yet yey yie yii yim yio yip yir yis yit ymc yme ymi ymm ymo yms ymt yob yoc yoe yoi yom yoo yop yor yos yot yoy ypo yps yrc yre yro yrp yrs yrt ysb ysc yse ysi ysm yso ysp ysr yss yst ysy ytc yte ytm yto ytp ytr yts ytt yyb yyc yye yys yyt yyy