sra srb srd sre srk srn sro srr srs srt sry ss- ssa ssb ssd sse ssk ssn sso ssr sss sst sta stb std ste stk stn sto str sts stt sty sy- sya syb syd sye syk syn syr sys syt taa tab tad tae tak tan tao tar tas tat tay tba tbb tbd tbe tbk tbn tbo tbr tbs tbt tda tdb tdd tde tdk tdn tdo tdr tds tdt tdy te- tea teb ted tee tek ten teo ter tes tet tey tka tkb tke tkk tko tkr tks tkt tky tna tnb tnd tne tnk tnn tno tnr tns tnt to- toa tob tod toe tok ton too tor tos tot toy tra trb trd tre trk trn tro trr trs trt try tsa tsb tsd tse tsk tsn tso tsr tss tst tsy tta ttb ttd tte ttk ttn tto ttr tts ttt tty tya tyd tye tyn tyo tyr tys tyt yaa yab yad yae yak yan yao yar yas yat yay ybe ybr ybs yby yda yde ydn ydo yds ydt ydy yea yeb yed yee yek yen yeo yer yes yet yey yka ykk ykn yna ynd yne ynk ynn yns yny yob yod yoe yok yon yoo yor yos yot yoy yra yre yrn yro yrs yrt ysa ysb yse ysk yso ysr yss yst ysy yta ytd yte ytk ytn yto ytr yts ytt yyb yye yys yyt yyy