-er -ic c-- ccc cce cci cck ccn ccp ccr ce- cec cee cei cek cen cep cer ci- cic cie cii cik cin cip cir ckc cki cn- cnc cne cni cnn cnp cnr cpc cpe cpi cpk cpn cpp cpr crc cre cri crk crn crp crr ec- ecc ece eci eck ecn ecr eec eee eek een eep eer eic eie eii eik ein eip eir ekc eke eki ekp ekr en- enc ene eni enk enn enp enr ep- epc epe epi epn epp epr erc ere eri erk ern erp err icc ice ici ick icn icp icr ie- iec iee iei iek ien iep ier iic iie iii iin iip iir ikc ike iki ikk ikr in- inc ine ini ink inn inp inr ipc ipe ipi ipn ipp ipr ir- irc ire iri irk irn irp irr kcc kce kci kck kcn kcp kcr ke- kec kee kei kek ken kep ker kic kie kii kik kin kip kir kkc kke kki kkk kkn kkp kkr kn- knc kne kni knk knn knp knr kpc kpe kpi kpk kpn kpp kpr krc kri krk krn krp krr n-i ncc nce nci nck ncn ncp ncr ne- nec nee nei nek nen nep ner nic nie nii nik nin nip nir nkc nke nki nkk nkn nkp nkr nnc nne nni nnk nnn nnp npc npe npi npn npp npr nrc nre nri nrk nrn nrp nrr p-p pcc pce pci pck pcn pcp pcr pec pee pei pek pen pep per pic pie pii pik pin pip pir pkc pke pki pkn pkp pkr pn- pnc pne pni pnk pnn pnp pnr ppc ppe ppi ppk ppn ppp ppr prc pre pri prk prn prp prr rcc rce rci rcn rcp rcr re- rec ree rei rek ren rep rer ric rie rii rik rin rip rir rkc rke rkk rkp rnc rni rnn rnp rnr rpc rpe rpi rpk rpn rpp rpr rrc rri rrk rrn rrp rrr