roe roh roi ron roo rop ror ros roy rpc rpd rpe rph rpi rpn rpo rpp rpr rps rrc rrd rrh rri rrn rrp rrr rrs rsc rsd rse rsh rsi rsn rso rsp rsr rss ry- ryc ryd rye ryn ryo ryr rys ryy scc scd sce sch sci scn sco scp scr scs sdc sdd sde sdh sdi sdn sdo sdp sdr sds sdy se- sec sed see seh sei sen seo sep ser ses sey sh- shc shd she shh shi shn sho shp shr shs shy sic sid sie sih sii sin sio sip sir sis snc snd sne sni snn sno snp snr sns sny soc sod soe soh soi son soo sop sor sos soy spc spd spe sph spi spn spo spp spr sps spy sr- src srd sre srh sri srn sro srp srr srs sry ss- ssc ssd sse ssh ssi ssn sso ssp ssr sss sy- syc syd sye syh syi syn syp syr sys ycc ycd yce ych yci yco ycp ycs ycy yde ydn ydo yds ydy yec yed yee yeh yei yen yeo yep yer yes yey yhc yhe yhi yhs yid yie yih yii yin yio yip yir yis ynd yne ynn ynp yns yny yoc yod yoe yoi yon yoo yop yor yos yoy ypd ypo yps yrc yre yrn yro yrp yrs ysc yse ysi yso ysp ysr yss ysy yyc yye yys yyy