sra srb src srf srg sri srn srr srs srt sry ss- ssa ssb ssc ssf ssg ssi ssn ssr sss sst sta stb stc stf stg sti stn str sts stt sty sy- sya syb syc syg syi syn syr sys syt taa tab tac taf tag tai tan tar tas tat tay tba tbb tbc tbf tbg tbi tbn tbr tbs tbt tca tcb tcc tcf tcg tci tcn tcr tcs tct tfa tfb tfc tff tfg tfi tfn tfr tfs tft tga tgb tgc tgf tgg tgi tgn tgr tgs tgt tgy tia tib tic tif tig tii tin tir tis tit tiy tna tnb tnc tnf tng tni tnn tnr tns tnt tra trb trc trf trg tri trn trr trs trt try tsa tsb tsc tsf tsg tsi tsn tsr tss tst tsy tta ttb ttc ttf ttg tti ttn ttr tts ttt tty tya tyc tyf tyg tyn tyr tys tyt yaa yab yac yaf yag yai yan yar yas yat yay ybc ybf ybg ybi ybr ybs yby yca ycc ycf yci ycs ycy yfa yfc yff yfr yfs yft yga ygc yif yig yii yin yir yis yit yna yng ynn yns yny yra yrc yrf yrg yrn yrs yrt ysa ysb ysc ysg ysi ysr yss yst ysy yta ytc ytf ytn ytr yts ytt yyb yyc yyf yyg yys yyt yyy