-er -ic c-- ccc ccd cce cci cck ccn ccr cdc cdd cde cdi cdk cdn cdr ce- cec ced cee cei cek cen cer ci- cic cid cie cii cik cin cir ckc ckd cki cn- cnc cnd cne cni cnn cnr crc crd cre cri crk crn crr dcc dcd dce dci dck dcn dcr ddc ddd dde ddi ddk ddn ddr de- dec ded dee dei dek den der di- dic did die dii dik din dir dkc dke dki dkk dkr dnc dnd dne dni dnk dnn dnr drc drd dre dri drk drn drr ec- ecc ecd ece eci eck ecn ecr ed- edc edd ede edi edk edn edr eec eed eee eek een eer eic eid eie eii eik ein eir ekc ekd eke eki ekr en- enc end ene eni enk enn enr erc erd ere eri erk ern err i-d icc icd ice ici ick icn icr idc idd ide idi idk idn idr ie- iec ied iee iei iek ien ier iic iid iie iii iin iir ikc ike iki ikk ikr in- inc ind ine ini ink inn inr ir- irc ird ire iri irk irn irr kcc kcd kce kci kck kcn kcr kdc kde kdk kdr ke- kec ked kee kei kek ken ker kic kid kie kii kik kin kir kkc kke kki kkk kkn kkr kn- knc knd kne kni knk knn knr krc krd kri krk krn krr n-i ncc ncd nce nci nck ncn ncr ndc ndd nde ndi ndk ndn ndr ne- nec ned nee nei nek nen ner nic nid nie nii nik nin nir nkc nke nki nkk nkn nkr nnc nne nni nnk nnn nrc nrd nre nri nrk nrn nrr rcc rcd rce rci rcn rcr rdc rdd rde rdi rdn rdr re- rec red ree rei rek ren rer ric rid rie rii rik rin rir rkc rke rkk rnc rnd rni rnn rnr rrc rrd rri rrk rrn rrr