-er c-- ccc ccd cce cch ccr cdc cdd cde cdh cdr ce- cec ced cee ceh cer ch- chc chd che chh chr crc crd cre crh crr dcc dcd dce dcr ddc ddd dde ddh ddr de- dec ded dee deh der dh- dhc dhd dhe dhh dhr drc drd dre drr ec- ecc ecd ece ech ecr ed- edc edd ede edh edr eec eed eee eer ehc ehd ehe ehh ehr erc erd ere erh err hcc hcd hce hch hcr hdc hdd hde hdh hdr he- hec hed hee heh her hhc hhd hhe hhh hhr hr- hrc hrd hre hrh hrr rcc rcd rce rch rcr rdc rdd rde rdh rdr re- rec red ree reh rer rh- rhc rhd rhe rhh rhr rrc rrd rrh rrr