-er c-- ccc cce ccg cco ccr ccs ccu ce- cec cee ceg ceo cer ces ceu cgc cge cgg cgo cgr cgs cgu co- coc coe cog coo cor cos cou crc cre crg cro crr crs cru csc cse csg cso csr css csu cuc cue cug cuo cur cus cuu ec- ecc ece ecg eco ecr ecs ecu eec eee eeg eeo eer ees egc ege egg ego egr egs egu eo- eoc eoe eog eoo eor eos eou erc ere erg ero err ers eru es- esc ese esg eso esr ess esu eu- euc eue eug eur eus gcc gce gcg gco gcr gcs gcu ge- gec gee geg geo ger ges geu ggc ggg ggo ggr ggs ggu goc goe gog goo gor gos gou grc gre grg gro grr grs gru gsc gse gsg gso gsr gss gsu gu- guc gue gug guo gur gus guu oc- occ ocg oco ocr ocs ocu oec oee oeg oeo oer oes ogc oge ogg ogo ogs oo- ooc oog ooo oor oos or- orc ore org oro orr ors oru os- osc ose osg oso osr oss osu ou- ouc oue ouo our ous rcc rce rcg rco rcr rcs rcu re- rec ree reg reo rer res reu rgc rge rgg rgo rgr rgs roc roe rog roo ror ros rou rrc rrg rrr rrs rru rsc rse rsg rso rsr rss rsu ruc rue rug ruo rur rus ruu scc sce scg sco scr scs scu se- sec see seg seo ser ses seu sgc sge sgg sgo sgr sgs sgu soc soe sog soo sor sos sou sr- src sre srg sro srr srs ss- ssc sse ssg sso ssr sss ssu suc sue sug suo sur sus suu ucc uce ucg uco ucr ucs ucu uec uee ueg uer ues ugc uge ugg ugo ugr ugs ugu uoc uoe uog uoo uor uos ur- urc ure urg uro urr urs uru usc use usg uso usr uss usu uuc uue uug uur uus uuu