rgo rgp rgr rgs rna rnb rnd rng rnn rno rnp rnr rns rny roa rob rod roe rog ron roo rop ror ros roy rpa rpb rpd rpe rpg rpn rpo rpp rpr rps rra rrb rrd rrg rrn rrp rrr rrs rsa rsb rsd rse rsg rsn rso rsp rsr rss ry- rya ryd rye ryg ryn ryo ryr rys ryy saa sab sad sae sag san sao sap sar sas say sba sbb sbd sbe sbg sbn sbo sbp sbr sbs sby sda sdb sdd sde sdg sdn sdo sdp sdr sds sdy se- sea seb sed see seg sen seo sep ser ses sey sga sgb sgd sge sgg sgn sgo sgp sgr sgs sna snb snd sne sng snn sno snp snr sns sny soa sob sod soe sog son soo sop sor sos soy spa spb spd spe spg spn spo spp spr sps spy sr- sra srb srd sre srg srn sro srp srr srs sry ss- ssa ssb ssd sse ssg ssn sso ssp ssr sss sy- sya syb syd sye syg syn syp syr sys yaa yab yad yae yag yan yao yap yar yas yay ybe ybg ybp ybr ybs yby yda yde ydg ydn ydo yds ydy yea yeb yed yee yeg yen yeo yep yer yes yey yga ygo yna ynd yne yng ynn ynp yns yny yob yod yoe yog yon yoo yop yor yos yoy ypa ypd ypg ypo yps yra yre yrg yrn yro yrp yrs ysa ysb yse ysg yso ysp ysr yss ysy yyb yye yyg yys yyy