spm spo spp spr sps spt spy sr- src srd srh sri srm sro srp srr srs srt sry ss- ssc ssd ssh ssi ssm sso ssp ssr sss sst stc std sth sti stm sto stp str sts stt sty sy- syc syd syh syi sym syp syr sys syt tcc tcd tch tci tcm tco tcp tcr tcs tct tdc tdd tdh tdi tdm tdo tdp tdr tds tdt tdy th- thc thd thh thi thm tho thp thr ths tht thy tic tid tih tii tim tio tip tir tis tit tiy tmc tmd tmh tmi tmm tmo tmp tmr tms tmt tmy to- toc tod toh toi tom too top tor tos tot toy tpc tpd tph tpi tpm tpo tpp tpr tps tpt trc trd trh tri trm tro trp trr trs trt try tsc tsd tsh tsi tsm tso tsp tsr tss tst tsy ttc ttd tth tti ttm tto ttp ttr tts ttt tty tyc tyd tym tyo typ tyr tys tyt ycc ycd ych yci yco ycp ycs ycy ydo yds ydt ydy yhc yhi yhs yht yid yih yii yim yio yip yir yis yit ymc ymi ymm ymo yms ymt yoc yod yoi yom yoo yop yor yos yot yoy ypd ypo yps yrc yro yrp yrs yrt ysc ysi ysm yso ysp ysr yss yst ysy ytc ytd yth ytm yto ytp ytr yts ytt yyc yys yyt yyy