-er -ic c-- ccc cce cci cck ccn ccr ce- cec cee cei cek cen cer ci- cic cie cii cik cin cir ckc cki cn- cnc cne cni cnn cnr crc cre cri crk crn crr ec- ecc ece eci eck ecn ecr eec eee eek een eer eic eie eii eik ein eir ekc eke eki ekr en- enc ene eni enk enn enr erc ere eri erk ern err icc ice ici ick icn icr ie- iec iee iei iek ien ier iic iie iii iin iir ikc ike iki ikk ikr in- inc ine ini ink inn inr ir- irc ire iri irk irn irr kcc kce kci kck kcn kcr ke- kec kee kei kek ken ker kic kie kii kik kin kir kkc kke kki kkk kkn kkr kn- knc kne kni knk knn knr krc kri krk krn krr n-i ncc nce nci nck ncn ncr ne- nec nee nei nek nen ner nic nie nii nik nin nir nkc nke nki nkk nkn nkr nnc nne nni nnk nnn nrc nre nri nrk nrn nrr rcc rce rci rcn rcr re- rec ree rei rek ren rer ric rie rii rik rin rir rkc rke rkk rnc rni rnn rnr rrc rri rrk rrn rrr