spo spp spr sps spt spy sr- srd sre srg sri srm sro srp srr srs srt sry ss- ssd sse ssg ssi ssm sso ssp ssr sss sst std ste stg sti stm sto stp str sts stt sty sy- syd sye syg syi sym syp syr sys syt tdd tde tdg tdi tdm tdo tdp tdr tds tdt tdy te- ted tee teg tei tem teo tep ter tes tet tey tge tgg tgi tgm tgo tgp tgr tgs tgt tgy tid tie tig tii tim tio tip tir tis tit tiy tmd tme tmg tmi tmm tmo tmp tmr tms tmt tmy to- tod toe tog toi tom too top tor tos tot toy tpd tpe tpg tpi tpm tpo tpp tpr tps tpt trd tre trg tri trm tro trp trr trs trt try tsd tse tsg tsi tsm tso tsp tsr tss tst tsy ttd tte ttg tti ttm tto ttp ttr tts ttt tty tyd tye tyg tym tyo typ tyr tys tyt yde ydg ydo yds ydt ydy yed yee yeg yei yem yeo yep yer yes yet yey ygm ygo yid yie yig yii yim yio yip yir yis yit yme ymg ymi ymm ymo yms ymt yod yoe yog yoi yom yoo yop yor yos yot yoy ypd ypg ypo yps yre yrg yro yrp yrs yrt yse ysg ysi ysm yso ysp ysr yss yst ysy ytd yte ytm yto ytp ytr yts ytt yye yyg yys yyt yyy