-er c-- ccc cce cch cco ccr ce- cec cee ceh ceo cer ch- chc che chh cho chr co- coc coe coh coo cor crc cre crh cro crr ec- ecc ece ech eco ecr eec eee eeo eer ehc ehe ehh eho ehr eo- eoc eoe eoh eoo eor erc ere erh ero err hcc hce hch hco hcr he- hec hee heh heo her hhc hhe hhh hho hhr hoc hoe hoh hoo hor hr- hrc hre hrh hro hrr oc- occ och oco ocr oec oee oeh oeo oer ohc ohe ohh oho ohr oo- ooc ooh ooo oor or- orc ore orh oro orr rcc rce rch rco rcr re- rec ree reh reo rer rh- rhc rhe rhh rho rhr roc roe roh roo ror rrc rrh rrr