rpi rpl rpm rpo rpp rpr rps rrb rrh rri rrl rrm rrp rrr rrs rsb rse rsh rsi rsl rsm rso rsp rsr rss ry- rye rym ryo ryr rys ryy sbb sbe sbh sbi sbl sbm sbo sbp sbr sbs sby se- seb see seh sei sel sem seo sep ser ses sey sh- shb she shh shi shl shm sho shp shr shs shy sib sie sih sii sil sim sio sip sir sis slb sle slh sli sll slm slo slp slr sls sly smb sme smh smi sml smm smo smp smr sms smy sob soe soh soi sol som soo sop sor sos soy spb spe sph spi spl spm spo spp spr sps spy sr- srb sre srh sri srl srm sro srp srr srs sry ss- ssb sse ssh ssi ssl ssm sso ssp ssr sss sy- syb sye syh syi syl sym syp syr sys ybe ybi ybl ybm ybp ybr ybs yby yeb yee yeh yei yel yem yeo yep yer yes yey yhe yhi yhs yie yih yii yim yio yip yir yis yle yli yll ylm ylr yls yly yme ymi yml ymm ymo yms yob yoe yoi yol yom yoo yop yor yos yoy ypl ypo yps yre yro yrp yrs ysb yse ysi ysl ysm yso ysp ysr yss ysy yyb yye yys yyy