spo spp spr sps spt spy sr- srd sre srg sri srn sro srp srr srs srt sry ss- ssd sse ssg ssi ssn sso ssp ssr sss sst std ste stg sti stn sto stp str sts stt sty sy- syd sye syg syi syn syp syr sys syt tdd tde tdg tdi tdn tdo tdp tdr tds tdt tdy te- ted tee teg tei ten teo tep ter tes tet tey tge tgg tgi tgn tgo tgp tgr tgs tgt tgy tid tie tig tii tin tio tip tir tis tit tiy tnd tne tng tni tnn tno tnp tnr tns tnt to- tod toe tog toi ton too top tor tos tot toy tpd tpe tpg tpi tpn tpo tpp tpr tps tpt trd tre trg tri trn tro trp trr trs trt try tsd tse tsg tsi tsn tso tsp tsr tss tst tsy ttd tte ttg tti ttn tto ttp ttr tts ttt tty tyd tye tyg tyn tyo typ tyr tys tyt yde ydg ydn ydo yds ydt ydy yed yee yeg yei yen yeo yep yer yes yet yey ygo yid yie yig yii yin yio yip yir yis yit ynd yne yng ynn ynp yns yny yod yoe yog yoi yon yoo yop yor yos yot yoy ypd ypg ypo yps yre yrg yrn yro yrp yrs yrt yse ysg ysi yso ysp ysr yss yst ysy ytd yte ytn yto ytp ytr yts ytt yye yyg yys yyt yyy