src sre srf sri srl srn srp srr srs srt sry ss- ssc sse ssf ssi ssl ssn ssp ssr sss sst stc ste stf sti stl stn stp str sts stt sty sy- syc sye syi syl syn syp syr sys syt tcc tce tcf tci tcl tcn tcp tcr tcs tct te- tec tee tef tei tel ten tep ter tes tet tey tfc tfe tff tfi tfl tfn tfp tfr tfs tft tic tie tif tii til tin tip tir tis tit tiy tlc tle tlf tli tll tln tlp tlr tls tlt tnc tne tnf tni tnl tnn tnp tnr tns tnt tpc tpe tpf tpi tpl tpn tpp tpr tps tpt trc tre trf tri trl trn trp trr trs trt try tsc tse tsf tsi tsl tsn tsp tsr tss tst tsy ttc tte ttf tti ttl ttn ttp ttr tts ttt tty tyc tye tyf tyl tyn typ tyr tys tyt ycc yce ycf yci ycl ycp ycs ycy yec yee yef yei yel yen yep yer yes yet yey yfc yfe yff yfr yfs yft yie yif yii yin yip yir yis yit ylc yle yli yll ylr yls ylt yly yne ynn ynp yns yny ypf ypl yps yrc yre yrf yrn yrp yrs yrt ysc yse ysi ysl ysp ysr yss yst ysy ytc yte ytf ytl ytn ytp ytr yts ytt yyc yye yyf yys yyt yyy