rjf rjk rjp rjr rke rkf rkk rko rkp rks rnd rni rnn rno rnp rnr rns rod roe rof roi roj rok ron roo rop ror ros rpd rpe rpf rpi rpk rpn rpo rpp rpr rps rrd rrf rri rrk rrn rrp rrr rrs rsd rse rsf rsi rsj rsk rsn rso rsp rsr rss sdd sde sdf sdi sdj sdk sdn sdo sdp sdr sds se- sed see sef sei sej sek sen seo sep ser ses sfd sfe sff sfi sfj sfk sfn sfo sfp sfr sfs sid sie sif sii sij sik sin sio sip sir sis sjd sje sjf sji sjj sjk sjp sjr sjs sk- skd ske skf ski skj skk sko skp skr sks snd sne snf sni snj snk snn sno snp snr sns sod soe sof soi soj sok son soo sop sor sos spd spe spf spi spk spn spo spp spr sps sr- srd sre srf sri srj srk srn sro srp srr srs ss- ssd sse ssf ssi ssj ssk ssn sso ssp ssr sss