-er c-- c-j ccc cce ccg ccj cco ccr ccs ce- cec cee ceg cej ceo cer ces cgc cge cgg cgo cgr cgs cjc cjg cjr cjs co- coc coe cog coj coo cor cos crc cre crg crj cro crr crs csc cse csg csj cso csr css ec- ecc ece ecg ecj eco ecr ecs eec eee eeg eeo eer ees egc ege egg ego egr egs ejc ejo eo- eoc eoe eog eoo eor eos erc ere erg ero err ers es- esc ese esg eso esr ess gcc gce gcg gco gcr gcs ge- gec gee geg geo ger ges ggc ggg ggj ggo ggr ggs gjc gje gjg gjr goc goe gog goo gor gos grc gre grg grj gro grr grs gsc gse gsg gsj gso gsr gss jcc jce jco jcr jcs jec jee jeg jej jeo jer jes jge jgo jgr jgs jjc jjg jjj jjr jjs joc joe jog joj joo jor jos jrc jrg jro jrr jrs jsc jse jsg jsj jso jsr jss oc- occ ocg ocj oco ocr ocs oec oee oeg oeo oer oes ogc oge ogg ogo ogs ojc oje ojo ojs oo- ooc oog ooo oor oos or- orc ore org oro orr ors os- osc ose osg osj oso osr oss rcc rce rcg rcj rco rcr rcs re- rec ree reg reo rer res rgc rge rgg rgo rgr rgs rjc rjg rjr roc roe rog roj roo ror ros rrc rrg rrr rrs rsc rse rsg rsj rso rsr rss scc sce scg scj sco scr scs se- sec see seg sej seo ser ses sgc sge sgg sgo sgr sgs sjc sje sjj sjr sjs soc soe sog soj soo sor sos sr- src sre srg srj sro srr srs ss- ssc sse ssg ssj sso ssr sss