rcc rcd rce rcf rci rcl rcn rcr rcs rcu rda rdc rdd rde rdf rdi rdl rdn rdr rds rdu re- rea rec red ree ref rei rel ren rer res reu rfa rfc rfd rfe rff rfi rfl rfn rfr rfs rfu ria ric rid rie rif rii ril rin rir ris rla rlc rld rle rlf rli rll rln rlr rls rlu rna rnc rnd rni rnn rnr rns rnu rra rrc rrd rrf rri rrl rrn rrr rrs rru rsa rsc rsd rse rsf rsi rsl rsn rsr rss rsu rua ruc rud rue ruf rui run rur rus ruu saa sac sad sae saf sai sal san sar sas sau sca scc scd sce scf sci scl scn scr scs scu sda sdc sdd sde sdf sdi sdl sdn sdr sds sdu se- sea sec sed see sef sei sel sen ser ses seu sfa sfc sfd sfe sff sfi sfl sfn sfr sfs sfu sia sic sid sie sif sii sil sin sir sis siu sla slc sld sle slf sli sll sln slr sls slu sna snc snd sne snf sni snl snn snr sns snu sr- sra src srd sre srf sri srl srn srr srs ss- ssa ssc ssd sse ssf ssi ssl ssn ssr sss ssu sua suc sud sue suf sui sul sun sur sus suu ua- uaa uac uad uae uaf uai ual uan uar uas uau uca ucc ucd uce ucf uci ucl ucn ucr ucs ucu uda udc udd ude udf udi udl udn udr uds udu uea uec ued uee uef uei uel uen uer ues ufa ufc ufd ufe uff ufi ufl ufn ufr ufs ufu uia uic uid uie uif uii uil uin uir uis uiu ula ulc uld ule ulf uli ull uln ulr uls ulu un- una unc und une unf uni unl unn unr uns unu ur- ura urc urd ure urf uri url urn urr urs uru usa usc usd use usf usi usl usn usr uss usu uua uuc uue uun uur uus uuu