-er -ic c-- ccc ccd cce cci ccn ccr cdc cdd cde cdi cdn cdr ce- cec ced cee cei cen cer ci- cic cid cie cii cin cir cn- cnc cnd cne cni cnn cnr crc crd cre cri crn crr dcc dcd dce dci dcn dcr ddc ddd dde ddi ddn ddr de- dec ded dee dei den der di- dic did die dii din dir dnc dnd dne dni dnn dnr drc drd dre dri drn drr ec- ecc ecd ece eci ecn ecr ed- edc edd ede edi edn edr eec eed eee een eer eic eid eie eii ein eir en- enc end ene eni enn enr erc erd ere eri ern err i-d icc icd ice ici icn icr idc idd ide idi idn idr ie- iec ied iee iei ien ier iic iid iie iii iin iir in- inc ind ine ini inn inr ir- irc ird ire iri irn irr n-i ncc ncd nce nci ncn ncr ndc ndd nde ndi ndn ndr ne- nec ned nee nei nen ner nic nid nie nii nin nir nnc nne nni nnn nrc nrd nre nri nrn nrr rcc rcd rce rci rcn rcr rdc rdd rde rdi rdn rdr re- rec red ree rei ren rer ric rid rie rii rin rir rnc rnd rni rnn rnr rrc rrd rri rrn rrr