-er -ol c-- ccc cce ccg ccl cco ccr ccs ce- cec cee ceg cel ceo cer ces cgc cge cgg cgl cgo cgr cgs cl- clc cle clg cll clo clr cls co- coc coe cog col coo cor cos crc cre crg crl cro crr crs csc cse csg csl cso csr css ec- ecc ece ecg ecl eco ecr ecs eec eee eeg eel eeo eer ees egc ege egg egl ego egr egs elc ele elg ell elo elr els eo- eoc eoe eog eol eoo eor eos erc ere erg erl ero err ers es- esc ese esg esl eso esr ess gcc gce gcg gcl gco gcr gcs ge- gec gee geg gel geo ger ges ggc ggg ggo ggr ggs glc gle glg gll glo glr gls goc goe gog gol goo gor gos grc gre grg grl gro grr grs gsc gse gsg gsl gso gsr gss lcc lce lcg lcl lco lcr lcs lec lee leg lel leo ler les lgc lge lgg lgl lgo lgr lgs llc lle llg lll llo llr lls loc loe log lol loo lor los lrc lrg lro lrr lrs lsc lse lsg lsl lso lsr lss oc- occ ocg ocl oco ocr ocs oec oee oeg oel oeo oer oes ogc oge ogg ogl ogo ogs olc ole olg oll olo ols oo- ooc oog ool ooo oor oos or- orc ore org orl oro orr ors os- osc ose osg osl oso osr oss rcc rce rcg rcl rco rcr rcs re- rec ree reg rel reo rer res rgc rge rgg rgo rgr rgs rlc rle rlg rll rlo rlr rls roc roe rog rol roo ror ros rrc rrg rrl rrr rrs rsc rse rsg rsl rso rsr rss scc sce scg scl sco scr scs se- sec see seg sel seo ser ses sgc sge sgg sgl sgo sgr sgs slc sle slg sll slo slr sls soc soe sog sol soo sor sos sr- src sre srg srl sro srr srs ss- ssc sse ssg ssl sso ssr sss