-er c-- ccc ccd cce cch cco ccr cdc cdd cde cdh cdo cdr ce- cec ced cee ceh ceo cer ch- chc chd che chh cho chr co- coc cod coe coh coo cor crc crd cre crh cro crr dcc dcd dce dco dcr ddc ddd dde ddh ddo ddr de- dec ded dee deh deo der dh- dhc dhd dhe dhh dho dhr doc dod doe doh doo dor drc drd dre dro drr ec- ecc ecd ece ech eco ecr ed- edc edd ede edh edo edr eec eed eee eeo eer ehc ehd ehe ehh eho ehr eo- eoc eod eoe eoh eoo eor erc erd ere erh ero err hcc hcd hce hch hco hcr hdc hdd hde hdh hdo hdr he- hec hed hee heh heo her hhc hhd hhe hhh hho hhr hoc hod hoe hoh hoo hor hr- hrc hrd hre hrh hro hrr oc- occ ocd och oco ocr odc odd ode odh odo odr oec oed oee oeh oeo oer ohc ohd ohe ohh oho ohr oo- ooc ood ooh ooo oor or- orc ord ore orh oro orr rcc rcd rce rch rco rcr rdc rdd rde rdh rdo rdr re- rec red ree reh reo rer rh- rhc rhd rhe rhh rho rhr roc rod roe roh roo ror rrc rrd rrh rrr