roi rom ron roo rop ror ros roy rpc rpe rpf rpi rpm rpn rpo rpp rpr rps rrc rrf rri rrm rrn rrp rrr rrs rsc rse rsf rsi rsm rsn rso rsp rsr rss ry- ryc rye ryf rym ryn ryo ryr rys ryy scc sce scf sci scm scn sco scp scr scs se- sec see sef sei sem sen seo sep ser ses sey sfc sfe sff sfi sfm sfn sfo sfp sfr sfs sic sie sif sii sim sin sio sip sir sis smc sme smf smi smm smn smo smp smr sms smy snc sne snf sni snm snn sno snp snr sns sny soc soe sof soi som son soo sop sor sos soy spc spe spf spi spm spn spo spp spr sps spy sr- src sre srf sri srm srn sro srp srr srs sry ss- ssc sse ssf ssi ssm ssn sso ssp ssr sss sy- syc sye syi sym syn syp syr sys ycc yce ycf yci yco ycp ycs ycy yec yee yef yei yem yen yeo yep yer yes yey yfc yfe yff yfm yfr yfs yie yif yii yim yin yio yip yir yis ymc yme ymi ymm ymo yms yne ynn ynp yns yny yoc yoe yof yoi yom yon yoo yop yor yos yoy ypf ypo yps yrc yre yrf yrn yro yrp yrs ysc yse ysi ysm yso ysp ysr yss ysy yyc yye yyf yys yyy