rpc rpd rph rpi rpm rpn rpo rpp rpr rps rrc rrd rrh rri rrm rrn rrp rrr rrs rsc rsd rsh rsi rsm rsn rso rsp rsr rss ry- ryc ryd rym ryn ryo ryr rys ryy scc scd sch sci scm scn sco scp scr scs sdc sdd sdh sdi sdm sdn sdo sdp sdr sds sdy sh- shc shd shh shi shm shn sho shp shr shs shy sic sid sih sii sim sin sio sip sir sis smc smd smh smi smm smn smo smp smr sms smy snc snd sni snm snn sno snp snr sns sny soc sod soh soi som son soo sop sor sos soy spc spd sph spi spm spn spo spp spr sps spy sr- src srd srh sri srm srn sro srp srr srs sry ss- ssc ssd ssh ssi ssm ssn sso ssp ssr sss sy- syc syd syh syi sym syn syp syr sys ycc ycd ych yci yco ycp ycs ycy ydn ydo yds ydy yhc yhi yhs yid yih yii yim yin yio yip yir yis ymc ymi ymm ymo yms ynd ynn ynp yns yny yoc yod yoi yom yon yoo yop yor yos yoy ypd ypo yps yrc yrn yro yrp yrs ysc ysi ysm yso ysp ysr yss ysy yyc yys yyy