rsi rsl rsn rso rsr rss ry- rye ryf ryg ryn ryo ryr rys ryy sbb sbe sbf sbg sbi sbl sbn sbo sbr sbs sby se- seb see sef seg sei sel sen seo ser ses sey sfb sfe sff sfg sfi sfl sfn sfo sfr sfs sgb sge sgf sgg sgi sgl sgn sgo sgr sgs sib sie sif sig sii sil sin sio sir sis slb sle slf slg sli sll sln slo slr sls sly snb sne snf sng sni snl snn sno snr sns sny sob soe sof sog soi sol son soo sor sos soy sr- srb sre srf srg sri srl srn sro srr srs sry ss- ssb sse ssf ssg ssi ssl ssn sso ssr sss sy- syb sye syg syi syl syn syr sys ybe ybf ybg ybi ybl ybr ybs yby yeb yee yef yeg yei yel yen yeo yer yes yey yfe yff yfr yfs ygl ygo yie yif yig yii yin yio yir yis yle ylg yli yll ylr yls yly yne yng ynn yns yny yob yoe yof yog yoi yol yon yoo yor yos yoy yre yrf yrg yrn yro yrs ysb yse ysg ysi ysl yso ysr yss ysy yyb yye yyf yyg yys yyy