ror ros roy rpb rpc rpe rph rpi rpn rpo rpp rpr rps rrb rrc rrh rri rrn rrp rrr rrs rsb rsc rse rsh rsi rsn rso rsp rsr rss ry- ryc rye ryn ryo ryr rys ryy sbb sbc sbe sbh sbi sbn sbo sbp sbr sbs sby scb scc sce sch sci scn sco scp scr scs se- seb sec see seh sei sen seo sep ser ses sey sh- shb shc she shh shi shn sho shp shr shs shy sib sic sie sih sii sin sio sip sir sis snb snc sne sni snn sno snp snr sns sny sob soc soe soh soi son soo sop sor sos soy spb spc spe sph spi spn spo spp spr sps spy sr- srb src sre srh sri srn sro srp srr srs sry ss- ssb ssc sse ssh ssi ssn sso ssp ssr sss sy- syb syc sye syh syi syn syp syr sys ybc ybe ybi ybp ybr ybs yby ycc yce ych yci yco ycp ycs ycy yeb yec yee yeh yei yen yeo yep yer yes yey yhc yhe yhi yhs yie yih yii yin yio yip yir yis yne ynn ynp yns yny yob yoc yoe yoi yon yoo yop yor yos yoy ypo yps yrc yre yrn yro yrp yrs ysb ysc yse ysi yso ysp ysr yss ysy yyb yyc yye yys yyy