-er c-- ccc ccd cce cch ccr ccs cdc cdd cde cdh cdr cds ce- cec ced cee ceh cer ces ch- chc chd che chh chr chs crc crd cre crh crr crs csc csd cse csh csr css dcc dcd dce dcr dcs ddc ddd dde ddh ddr dds de- dec ded dee deh der des dh- dhc dhd dhe dhh dhr dhs drc drd dre drr drs dsc dsd dse dsh dsr dss ec- ecc ecd ece ech ecr ecs ed- edc edd ede edh edr eds eec eed eee eer ees ehc ehd ehe ehh ehr ehs erc erd ere erh err ers es- esc esd ese esh esr ess hcc hcd hce hch hcr hcs hdc hdd hde hdh hdr hds he- hec hed hee heh her hes hhc hhd hhe hhh hhr hhs hr- hrc hrd hre hrh hrr hrs hsc hsd hse hsh hsr hss rcc rcd rce rch rcr rcs rdc rdd rde rdh rdr rds re- rec red ree reh rer res rh- rhc rhd rhe rhh rhr rhs rrc rrd rrh rrr rrs rsc rsd rse rsh rsr rss scc scd sce sch scr scs sdc sdd sde sdh sdr sds se- sec sed see seh ser ses sh- shc shd she shh shr shs sr- src srd sre srh srr srs ss- ssc ssd sse ssh ssr sss