-er c-- ccc cce ccm cco ccr ccs ccu ce- cec cee cem ceo cer ces ceu cmc cme cmm cmo cmr cms cmu co- coc coe com coo cor cos cou crc cre crm cro crr crs cru csc cse csm cso csr css csu cuc cue cum cuo cur cus cuu ec- ecc ece ecm eco ecr ecs ecu eec eee eem eeo eer ees em- emc eme emm emo emr ems emu eo- eoc eoe eom eoo eor eos eou erc ere erm ero err ers eru es- esc ese esm eso esr ess esu eu- euc eue eur eus m-o m-r mc- mcc mce mcm mco mcr mcs mcu mec mee mem meo mer mes meu mmc mme mmm mmo mmr mms mmu moc moe mom moo mor mos mou mrc mre mrm mro mrr mrs mru msc mse msm mso msr mss msu muc mue mum mur mus muu oc- occ ocm oco ocr ocs ocu oec oee oem oeo oer oes om- omc ome omm omo omr oms omu oo- ooc oom ooo oor oos or- orc ore orm oro orr ors oru os- osc ose osm oso osr oss osu ou- ouc oue oum ouo our ous rcc rce rcm rco rcr rcs rcu re- rec ree rem reo rer res reu rmc rme rmm rmo rmr rms roc roe rom roo ror ros rou rrc rrm rrr rrs rru rsc rse rsm rso rsr rss rsu ruc rue rum ruo rur rus ruu scc sce scm sco scr scs scu se- sec see sem seo ser ses seu smc sme smm smo smr sms smu soc soe som soo sor sos sou sr- src sre srm sro srr srs ss- ssc sse ssm sso ssr sss ssu suc sue sum suo sur sus suu ucc uce ucm uco ucr ucs ucu uec uee uem uer ues um- umc ume umm umo umr ums umu uoc uoe uom uoo uor uos ur- urc ure urm uro urr urs uru usc use usm uso usr uss usu uuc uue uum uur uus uuu