rcf rch rci rcn rco rcr rcs rcu rfa rfb rfc rff rfh rfi rfn rfo rfr rfs rfu rh- rha rhb rhc rhf rhh rhi rhn rho rhr rhs rhu ria rib ric rif rih rii rin rio rir ris rna rnb rnc rnh rni rnn rno rnr rns rnu roa rob roc rof roh roi ron roo ror ros rou rra rrb rrc rrf rrh rri rrn rrr rrs rru rsa rsb rsc rsf rsh rsi rsn rso rsr rss rsu rua rub ruc ruf ruh rui run ruo rur rus ruu saa sab sac saf sah sai san sao sar sas sau sba sbb sbc sbf sbh sbi sbn sbo sbr sbs sbu sca scb scc scf sch sci scn sco scr scs scu sfa sfb sfc sff sfh sfi sfn sfo sfr sfs sfu sh- sha shb shc shf shh shi shn sho shr shs shu sia sib sic sif sih sii sin sio sir sis siu sna snb snc snf sni snn sno snr sns snu soa sob soc sof soh soi son soo sor sos sou sr- sra srb src srf srh sri srn sro srr srs ss- ssa ssb ssc ssf ssh ssi ssn sso ssr sss ssu sua sub suc suf suh sui sun suo sur sus suu ua- uaa uab uac uaf uah uai uan uao uar uas uau uba ubb ubc ubf ubh ubi ubn ubo ubr ubs ubu uca ucb ucc ucf uch uci ucn uco ucr ucs ucu ufa ufc uff ufh ufi ufn ufo ufr ufs ufu uha uhb uhc uhf uhh uhi uho uhr uhs uhu uia uib uic uif uii uin uio uir uis uiu un- una unb unc unf unh uni unn uno unr uns unu uoa uob uoc uon uoo uor uos ur- ura urb urc urf uri urn uro urr urs uru usa usb usc usf ush usi usn uso usr uss usu uua uuc uun uur uus uuu