spn spo spp spr sps spt spy sr- srb sre sri srl srn sro srp srr srs srt sry ss- ssb sse ssi ssl ssn sso ssp ssr sss sst stb ste sti stl stn sto stp str sts stt sty sy- syb sye syi syl syn syp syr sys syt tbb tbe tbi tbl tbn tbo tbp tbr tbs tbt te- teb tee tei tel ten teo tep ter tes tet tey tib tie tii til tin tio tip tir tis tit tiy tle tli tll tln tlo tlp tlr tls tlt tnb tne tni tnl tnn tno tnp tnr tns tnt to- tob toe toi tol ton too top tor tos tot toy tpb tpe tpi tpl tpn tpo tpp tpr tps tpt trb tre tri trl trn tro trp trr trs trt try tsb tse tsi tsl tsn tso tsp tsr tss tst tsy ttb tte tti ttl ttn tto ttp ttr tts ttt tty tye tyl tyn tyo typ tyr tys tyt ybe ybi ybl ybp ybr ybs yby yeb yee yei yel yen yeo yep yer yes yet yey yie yii yin yio yip yir yis yit yle yli yll ylr yls ylt yly yne ynn ynp yns yny yob yoe yoi yol yon yoo yop yor yos yot yoy ypl ypo yps yre yrn yro yrp yrs yrt ysb yse ysi ysl yso ysp ysr yss yst ysy yte ytl ytn yto ytp ytr yts ytt yyb yye yys yyt yyy