-er c-- ccc cce ccg cch cco ccr ce- cec cee ceg ceh ceo cer cgc cge cgg cgh cgo cgr ch- chc che chg chh cho chr co- coc coe cog coh coo cor crc cre crg crh cro crr ec- ecc ece ecg ech eco ecr eec eee eeg eeo eer egc ege egg egh ego egr ehc ehe ehg ehh eho ehr eo- eoc eoe eog eoh eoo eor erc ere erg erh ero err gcc gce gcg gch gco gcr ge- gec gee geg geh geo ger ggc ggg ggh ggo ggr ghc ghe ghg ghh gho ghr goc goe gog goh goo gor grc gre grg grh gro grr hcc hce hcg hch hco hcr he- hec hee heg heh heo her hgc hge hgg hgh hgo hgr hhc hhe hhg hhh hho hhr hoc hoe hog hoh hoo hor hr- hrc hre hrg hrh hro hrr oc- occ ocg och oco ocr oec oee oeg oeh oeo oer ogc oge ogg ogh ogo ohc ohe ohg ohh oho ohr oo- ooc oog ooh ooo oor or- orc ore org orh oro orr rcc rce rcg rch rco rcr re- rec ree reg reh reo rer rgc rge rgg rgh rgo rgr rh- rhc rhe rhg rhh rho rhr roc roe rog roh roo ror rrc rrg rrh rrr