-er c-- ccc cce ccg cch cck cco ccr ce- cec cee ceg ceh cek ceo cer cgc cge cgg cgh cgo cgr ch- chc che chg chh chk cho chr ckc ckh cko co- coc coe cog coh cok coo cor crc cre crg crh crk cro crr ec- ecc ece ecg ech eck eco ecr eec eee eeg eek eeo eer egc ege egg egh ego egr ehc ehe ehg ehh eho ehr ekc eke ekg ekh eko ekr eo- eoc eoe eog eoh eok eoo eor erc ere erg erh erk ero err gcc gce gcg gch gck gco gcr ge- gec gee geg geh gek geo ger ggc ggg ggh ggo ggr ghc ghe ghg ghh gho ghr gkh gko goc goe gog goh gok goo gor grc gre grg grh grk gro grr hcc hce hcg hch hck hco hcr he- hec hee heg heh hek heo her hgc hge hgg hgh hgk hgo hgr hhc hhe hhg hhh hhk hho hhr hkg hkh hkk hko hkr hoc hoe hog hoh hok hoo hor hr- hrc hre hrg hrh hrk hro hrr kcc kce kcg kch kck kcr ke- kec kee keg keh kek keo ker kgc kgh kgo khe khh khk kho khr kkc kke kkh kkk kkr koc koe kog koh kok koo kor krc krg krk kro krr oc- occ ocg och ock oco ocr oec oee oeg oeh oeo oer ogc oge ogg ogh ogo ohc ohe ohg ohh oho ohr okc oke okg okk oko okr oo- ooc oog ooh ook ooo oor or- orc ore org orh ork oro orr rcc rce rcg rch rco rcr re- rec ree reg reh rek reo rer rgc rge rgg rgh rgk rgo rgr rh- rhc rhe rhg rhh rho rhr rkc rke rkg rkk rko roc roe rog roh rok roo ror rrc rrg rrh rrk rrr