soe sol son soo sop sor sos sot soy spc spd spe spl spn spo spp spr sps spt spy sr- src srd sre srl srn sro srp srr srs srt sry ss- ssc ssd sse ssl ssn sso ssp ssr sss sst stc std ste stl stn sto stp str sts stt sty sy- syc syd sye syl syn syp syr sys syt tcc tcd tce tcl tcn tco tcp tcr tcs tct tdc tdd tde tdl tdn tdo tdp tdr tds tdt tdy te- tec ted tee tel ten teo tep ter tes tet tey tlc tld tle tll tln tlo tlp tlr tls tlt tnc tnd tne tnl tnn tno tnp tnr tns tnt to- toc tod toe tol ton too top tor tos tot toy tpc tpd tpe tpl tpn tpo tpp tpr tps tpt trc trd tre trl trn tro trp trr trs trt try tsc tsd tse tsl tsn tso tsp tsr tss tst tsy ttc ttd tte ttl ttn tto ttp ttr tts ttt tty tyc tyd tye tyl tyn tyo typ tyr tys tyt ycc ycd yce ycl yco ycp ycs ycy yde ydl ydn ydo yds ydt ydy yec yed yee yel yen yeo yep yer yes yet yey ylc yld yle yll ylr yls ylt yly ynd yne ynn ynp yns yny yoc yod yoe yol yon yoo yop yor yos yot yoy ypd ypl ypo yps yrc yre yrn yro yrp yrs yrt ysc yse ysl yso ysp ysr yss yst ysy ytc ytd yte ytl ytn yto ytp ytr yts ytt yyc yye yys yyt yyy