ras rca rcc rce rcg rci rcj rcn rco rcr rcs re- rea rec ree reg rei rek ren reo rer res rga rgc rge rgg rgi rgk rgn rgo rgr rgs ria ric rie rig rii rik rin rio rir ris rja rjc rjg rjk rjr rkc rke rkg rkk rko rks rna rnc rng rni rnn rno rnr rns roa roc roe rog roi roj rok ron roo ror ros rra rrc rrg rri rrk rrn rrr rrs rsa rsc rse rsg rsi rsj rsk rsn rso rsr rss saa sac sae sag sai saj sak san sao sar sas sca scc sce scg sci scj sck scn sco scr scs se- sea sec see seg sei sej sek sen seo ser ses sga sgc sge sgg sgi sgk sgn sgo sgr sgs sia sic sie sig sii sij sik sin sio sir sis sja sjc sje sji sjj sjk sjr sjs sk- ska skc ske skg ski skj skk sko skr sks sna snc sne sng sni snj snk snn sno snr sns soa soc soe sog soi soj sok son soo sor sos sr- sra src sre srg sri srj srk srn sro srr srs ss- ssa ssc sse ssg ssi ssj ssk ssn sso ssr sss