sos sot soy sr- srb src sre srf sri srn sro srr srs srt sry ss- ssb ssc sse ssf ssi ssn sso ssr sss sst stb stc ste stf sti stn sto str sts stt sty sy- syb syc sye syi syn syr sys syt tbb tbc tbe tbf tbi tbn tbo tbr tbs tbt tcb tcc tce tcf tci tcn tco tcr tcs tct te- teb tec tee tef tei ten teo ter tes tet tey tfb tfc tfe tff tfi tfn tfo tfr tfs tft tib tic tie tif tii tin tio tir tis tit tiy tnb tnc tne tnf tni tnn tno tnr tns tnt to- tob toc toe tof toi ton too tor tos tot toy trb trc tre trf tri trn tro trr trs trt try tsb tsc tse tsf tsi tsn tso tsr tss tst tsy ttb ttc tte ttf tti ttn tto ttr tts ttt tty tyc tye tyf tyn tyo tyr tys tyt ybc ybe ybf ybi ybr ybs yby ycc yce ycf yci yco ycs ycy yeb yec yee yef yei yen yeo yer yes yet yey yfc yfe yff yfr yfs yft yie yif yii yin yio yir yis yit yne ynn yns yny yob yoc yoe yof yoi yon yoo yor yos yot yoy yrc yre yrf yrn yro yrs yrt ysb ysc yse ysi yso ysr yss yst ysy ytc yte ytf ytn yto ytr yts ytt yyb yyc yye yyf yys yyt yyy