slt sly soa soc soe sog sol soo sop sor sos sot soy spa spc spe spg spl spo spp spr sps spt spy sr- sra src sre srg srl sro srp srr srs srt sry ss- ssa ssc sse ssg ssl sso ssp ssr sss sst sta stc ste stg stl sto stp str sts stt sty sy- sya syc sye syg syl syp syr sys syt taa tac tae tag tal tao tap tar tas tat tay tca tcc tce tcg tcl tco tcp tcr tcs tct te- tea tec tee teg tel teo tep ter tes tet tey tga tgc tge tgg tgl tgo tgp tgr tgs tgt tgy tla tlc tle tlg tll tlo tlp tlr tls tlt to- toa toc toe tog tol too top tor tos tot toy tpa tpc tpe tpg tpl tpo tpp tpr tps tpt tra trc tre trg trl tro trp trr trs trt try tsa tsc tse tsg tsl tso tsp tsr tss tst tsy tta ttc tte ttg ttl tto ttp ttr tts ttt tty tya tyc tye tyg tyl tyo typ tyr tys tyt yaa yac yae yag yal yao yap yar yas yat yay yca ycc yce ycl yco ycp ycs ycy yea yec yee yeg yel yeo yep yer yes yet yey yga ygc ygl ygo ylc yle ylg yll ylr yls ylt yly yoc yoe yog yol yoo yop yor yos yot yoy ypa ypg ypl ypo yps yra yrc yre yrg yro yrp yrs yrt ysa ysc yse ysg ysl yso ysp ysr yss yst ysy yta ytc yte ytl yto ytp ytr yts ytt yyc yye yyg yys yyt yyy