onr ons oo- ooa ooc oof oog ooh ooi ook oon ooo oor oos or- ora orc orf org orh ori ork orn oro orr ors os- osa osc osf osg osh osi osk osn oso osr oss ra- raa rac raf rag rah rai rak ran rao rar ras rca rcc rcf rcg rch rci rcn rco rcr rcs rfa rfc rff rfg rfh rfi rfk rfn rfo rfr rfs rga rgc rgf rgg rgh rgi rgk rgn rgo rgr rgs rh- rha rhc rhf rhg rhh rhi rhn rho rhr rhs ria ric rif rig rih rii rik rin rio rir ris rkc rkf rkg rkk rko rks rna rnc rng rnh rni rnn rno rnr rns roa roc rof rog roh roi rok ron roo ror ros rra rrc rrf rrg rrh rri rrk rrn rrr rrs rsa rsc rsf rsg rsh rsi rsk rsn rso rsr rss saa sac saf sag sah sai sak san sao sar sas sca scc scf scg sch sci sck scn sco scr scs sfa sfc sff sfg sfh sfi sfk sfn sfo sfr sfs sga sgc sgf sgg sgh sgi sgk sgn sgo sgr sgs sh- sha shc shf shg shh shi shk shn sho shr shs sia sic sif sig sih sii sik sin sio sir sis sk- ska skc skf skg skh ski skk sko skr sks sna snc snf sng sni snk snn sno snr sns soa soc sof sog soh soi sok son soo sor sos sr- sra src srf srg srh sri srk srn sro srr srs ss- ssa ssc ssf ssg ssh ssi ssk ssn sso ssr sss