-er -ol c-- ccc cce ccg cck ccl cco ccr ccs ce- cec cee ceg cek cel ceo cer ces cgc cge cgg cgl cgo cgr cgs ckc cko cks cl- clc cle clg clk cll clo clr cls co- coc coe cog cok col coo cor cos crc cre crg crk crl cro crr crs csc cse csg csk csl cso csr css ec- ecc ece ecg eck ecl eco ecr ecs eec eee eeg eek eel eeo eer ees egc ege egg egl ego egr egs ekc eke ekg ekl eko ekr eks elc ele elg elk ell elo elr els eo- eoc eoe eog eok eol eoo eor eos erc ere erg erk erl ero err ers es- esc ese esg esk esl eso esr ess gcc gce gcg gck gcl gco gcr gcs ge- gec gee geg gek gel geo ger ges ggc ggg ggo ggr ggs gko gks glc gle glg glk gll glo glr gls goc goe gog gok gol goo gor gos grc gre grg grk grl gro grr grs gsc gse gsg gsk gsl gso gsr gss kcc kce kcg kck kcl kcr kcs ke- kec kee keg kek kel keo ker kes kgc kgl kgo kgs kkc kke kkk kkl kkr kks kl- klc klg klo klr kls koc koe kog kok kol koo kor kos krc krg krk krl kro krr krs ksc kse ksg ksk ksl kso ksr kss lcc lce lcg lck lcl lco lcr lcs lec lee leg lek lel leo ler les lgc lge lgg lgk lgl lgo lgr lgs lkg lkl lkr lks llc lle llg llk lll llo llr lls loc loe log lok lol loo lor los lrc lrg lrk lro lrr lrs lsc lse lsg lsk lsl lso lsr lss oc- occ ocg ock ocl oco ocr ocs oec oee oeg oel oeo oer oes ogc oge ogg ogl ogo ogs okc oke okg okk okl oko okr oks olc ole olg olk oll olo ols oo- ooc oog ook ool ooo oor oos or- orc ore org ork orl oro orr ors os- osc ose osg osk osl oso osr oss rcc rce rcg rcl rco rcr rcs re- rec ree reg rek rel reo rer res rgc rge rgg rgk rgo rgr rgs rkc rke rkg rkk rko rks rlc rle rlg rll rlo rlr rls roc roe rog rok rol roo ror ros rrc rrg rrk rrl rrr rrs rsc rse rsg rsk rsl rso rsr rss scc sce scg sck scl sco scr scs se- sec see seg sek sel seo ser ses sgc sge sgg sgk sgl sgo sgr sgs sk- skc ske skg skk skl sko skr sks slc sle slg slk sll slo slr sls soc soe sog sok sol soo sor sos sr- src sre srg srk srl sro srr srs ss- ssc sse ssg ssk ssl sso ssr sss