rcd rce rcg rci rcn rco rcr rcs rcu rda rdc rdd rde rdg rdi rdn rdo rdr rds rdu re- rea rec red ree reg rei ren reo rer res reu rga rgc rgd rge rgg rgi rgn rgo rgr rgs ria ric rid rie rig rii rin rio rir ris rna rnc rnd rng rni rnn rno rnr rns rnu roa roc rod roe rog roi ron roo ror ros rou rra rrc rrd rrg rri rrn rrr rrs rru rsa rsc rsd rse rsg rsi rsn rso rsr rss rsu rua ruc rud rue rug rui run ruo rur rus ruu saa sac sad sae sag sai san sao sar sas sau sca scc scd sce scg sci scn sco scr scs scu sda sdc sdd sde sdg sdi sdn sdo sdr sds sdu se- sea sec sed see seg sei sen seo ser ses seu sga sgc sgd sge sgg sgi sgn sgo sgr sgs sgu sia sic sid sie sig sii sin sio sir sis siu sna snc snd sne sng sni snn sno snr sns snu soa soc sod soe sog soi son soo sor sos sou sr- sra src srd sre srg sri srn sro srr srs ss- ssa ssc ssd sse ssg ssi ssn sso ssr sss ssu sua suc sud sue sug sui sun suo sur sus suu ua- uaa uac uad uae uag uai uan uao uar uas uau uca ucc ucd uce ucg uci ucn uco ucr ucs ucu uda udc udd ude udg udi udn udo udr uds udu uea uec ued uee ueg uei uen uer ues uga ugc uge ugg ugi ugn ugo ugr ugs ugu uia uic uid uie uig uii uin uio uir uis uiu un- una unc und une ung uni unn uno unr uns unu uoa uoc uod uoe uog uon uoo uor uos ur- ura urc urd ure urg uri urn uro urr urs uru usa usc usd use usg usi usn uso usr uss usu uua uuc uue uug uun uur uus uuu