sib sic sie sii sil sip sir sis sit sla slb slc sle sli sll slp slr sls slt sly spa spb spc spe spi spl spp spr sps spt spy sr- sra srb src sre sri srl srp srr srs srt sry ss- ssa ssb ssc sse ssi ssl ssp ssr sss sst sta stb stc ste sti stl stp str sts stt sty sy- sya syb syc sye syi syl syp syr sys syt taa tab tac tae tai tal tap tar tas tat tay tba tbb tbc tbe tbi tbl tbp tbr tbs tbt tca tcb tcc tce tci tcl tcp tcr tcs tct te- tea teb tec tee tei tel tep ter tes tet tey tia tib tic tie tii til tip tir tis tit tiy tla tlc tle tli tll tlp tlr tls tlt tpa tpb tpc tpe tpi tpl tpp tpr tps tpt tra trb trc tre tri trl trp trr trs trt try tsa tsb tsc tse tsi tsl tsp tsr tss tst tsy tta ttb ttc tte tti ttl ttp ttr tts ttt tty tya tyc tye tyl typ tyr tys tyt yaa yab yac yae yai yal yap yar yas yat yay ybc ybe ybi ybl ybp ybr ybs yby yca ycc yce yci ycl ycp ycs ycy yea yeb yec yee yei yel yep yer yes yet yey yie yii yip yir yis yit ylc yle yli yll ylr yls ylt yly ypa ypl yps yra yrc yre yrp yrs yrt ysa ysb ysc yse ysi ysl ysp ysr yss yst ysy yta ytc yte ytl ytp ytr yts ytt yyb yyc yye yys yyt yyy