rcd rce rcf rcl rcm rco rcr rcs rcu rda rdc rdd rde rdf rdl rdm rdo rdr rds rdu re- rea rec red ree ref rel rem reo rer res reu rfa rfc rfd rfe rff rfl rfm rfo rfr rfs rfu rla rlc rld rle rlf rll rlm rlo rlr rls rlu rma rmc rmd rme rmf rml rmm rmo rmr rms roa roc rod roe rof rol rom roo ror ros rou rra rrc rrd rrf rrl rrm rrr rrs rru rsa rsc rsd rse rsf rsl rsm rso rsr rss rsu rua ruc rud rue ruf rum ruo rur rus ruu saa sac sad sae saf sal sam sao sar sas sau sca scc scd sce scf scl scm sco scr scs scu sda sdc sdd sde sdf sdl sdm sdo sdr sds sdu se- sea sec sed see sef sel sem seo ser ses seu sfa sfc sfd sfe sff sfl sfm sfo sfr sfs sfu sla slc sld sle slf sll slm slo slr sls slu sma smc smd sme smf sml smm smo smr sms smu soa soc sod soe sof sol som soo sor sos sou sr- sra src srd sre srf srl srm sro srr srs ss- ssa ssc ssd sse ssf ssl ssm sso ssr sss ssu sua suc sud sue suf sul sum suo sur sus suu ua- uaa uac uad uae uaf ual uam uao uar uas uau uca ucc ucd uce ucf ucl ucm uco ucr ucs ucu uda udc udd ude udf udl udm udo udr uds udu uea uec ued uee uef uel uem uer ues ufa ufc ufd ufe uff ufl ufm ufo ufr ufs ufu ula ulc uld ule ulf ull ulm ulo ulr uls ulu um- uma umc umd ume umf uml umm umo umr ums umu uoa uoc uod uoe uol uom uoo uor uos ur- ura urc urd ure urf url urm uro urr urs uru usa usc usd use usf usl usm uso usr uss usu uua uuc uue uum uur uus uuu