sos sot soy ss- ssb ssc ssd sse ssi ssk ssm sso sss sst stb stc std ste sti stk stm sto sts stt sty sy- syb syc syd sye syi syk sym sys syt tbb tbc tbd tbe tbi tbk tbm tbo tbs tbt tcb tcc tcd tce tci tck tcm tco tcs tct tdb tdc tdd tde tdi tdk tdm tdo tds tdt tdy te- teb tec ted tee tei tek tem teo tes tet tey tib tic tid tie tii tik tim tio tis tit tiy tkb tkc tke tkk tkm tko tks tkt tky tmb tmc tmd tme tmi tmk tmm tmo tms tmt tmy to- tob toc tod toe toi tok tom too tos tot toy tsb tsc tsd tse tsi tsk tsm tso tss tst tsy ttb ttc ttd tte tti ttk ttm tto tts ttt tty tyc tyd tye tym tyo tys tyt ybc ybe ybi ybm ybs yby ycc ycd yce yci yco ycs ycy yde ydo yds ydt ydy yeb yec yed yee yei yek yem yeo yes yet yey yid yie yii yim yio yis yit yki ykk ykm ymc yme ymi ymm ymo yms ymt yob yoc yod yoe yoi yok yom yoo yos yot yoy ysb ysc yse ysi ysk ysm yso yss yst ysy ytc ytd yte ytk ytm yto yts ytt yyb yyc yye yys yyt yyy