-er -ic c-- ccc cce ccf cci cck ccn ccr ce- cec cee cef cei cek cen cer cfc cfe cff cfi cfk cfn cfr ci- cic cie cif cii cik cin cir ckc cki cn- cnc cne cnf cni cnn cnr crc cre crf cri crk crn crr ec- ecc ece ecf eci eck ecn ecr eec eee eef eek een eer ef- efc efe eff efi efr eic eie eif eii eik ein eir ekc eke ekf eki ekr en- enc ene enf eni enk enn enr erc ere erf eri erk ern err fcc fce fcf fci fck fcn fcr fec fee fef fei fek fen fer ffc ffe fff ffi ffk ffn ffr fic fie fif fii fik fin fir fkc fkf fki fkk fnc fne fnf fni fnk fnn fnr frc fre frf fri frk frn frr i-f icc ice icf ici ick icn icr ie- iec iee ief iei iek ien ier ifc ife iff ifi ifn ifr iic iie iif iii iin iir ikc ike ikf iki ikk ikr in- inc ine inf ini ink inn inr ir- irc ire irf iri irk irn irr kcc kce kci kck kcn kcr ke- kec kee kef kei kek ken ker kfc kff kfi kic kie kif kii kik kin kir kkc kke kki kkk kkn kkr kn- knc kne knf kni knk knn knr krc krf kri krk krn krr n-i ncc nce ncf nci nck ncn ncr ne- nec nee nef nei nek nen ner nfc nfe nff nfi nfk nfn nfr nic nie nif nii nik nin nir nkc nke nkf nki nkk nkn nkr nnc nne nnf nni nnk nnn nrc nre nrf nri nrk nrn nrr rcc rce rcf rci rcn rcr re- rec ree ref rei rek ren rer rfc rfe rff rfi rfk rfn rfr ric rie rif rii rik rin rir rkc rke rkf rkk rnc rni rnn rnr rrc rrf rri rrk rrn rrr