ras rau rba rbb rbc rbf rbi rbm rbn rbo rbr rbs rbu rca rcb rcc rcf rci rcm rcn rco rcr rcs rcu rfa rfb rfc rff rfi rfm rfn rfo rfr rfs rfu ria rib ric rif rii rim rin rio rir ris rma rmb rmc rmf rmi rmm rmn rmo rmr rms rna rnb rnc rni rnm rnn rno rnr rns rnu roa rob roc rof roi rom ron roo ror ros rou rra rrb rrc rrf rri rrm rrn rrr rrs rru rsa rsb rsc rsf rsi rsm rsn rso rsr rss rsu rua rub ruc ruf rui rum run ruo rur rus ruu saa sab sac saf sai sam san sao sar sas sau sba sbb sbc sbf sbi sbm sbn sbo sbr sbs sbu sca scb scc scf sci scm scn sco scr scs scu sfa sfb sfc sff sfi sfm sfn sfo sfr sfs sfu sia sib sic sif sii sim sin sio sir sis siu sma smb smc smf smi smm smn smo smr sms smu sna snb snc snf sni snm snn sno snr sns snu soa sob soc sof soi som son soo sor sos sou sr- sra srb src srf sri srm srn sro srr srs ss- ssa ssb ssc ssf ssi ssm ssn sso ssr sss ssu sua sub suc suf sui sum sun suo sur sus suu ua- uaa uab uac uaf uai uam uan uao uar uas uau uba ubb ubc ubf ubi ubn ubo ubr ubs ubu uca ucb ucc ucf uci ucm ucn uco ucr ucs ucu ufa ufc uff ufi ufm ufn ufo ufr ufs ufu uia uib uic uif uii uim uin uio uir uis uiu um- uma umb umc umf umi umm umn umo umr ums umu un- una unb unc unf uni unm unn uno unr uns unu uoa uob uoc uom uon uoo uor uos ur- ura urb urc urf uri urm urn uro urr urs uru usa usb usc usf usi usm usn uso usr uss usu uua uuc uum uun uur uus uuu