-er -ic c-- ccc cce cci ccn ccp ccr ce- cec cee cei cen cep cer ci- cic cie cii cin cip cir cn- cnc cne cni cnn cnp cnr cpc cpe cpi cpn cpp cpr crc cre cri crn crp crr ec- ecc ece eci ecn ecr eec eee een eep eer eic eie eii ein eip eir en- enc ene eni enn enp enr ep- epc epe epi epn epp epr erc ere eri ern erp err icc ice ici icn icp icr ie- iec iee iei ien iep ier iic iie iii iin iip iir in- inc ine ini inn inp inr ipc ipe ipi ipn ipp ipr ir- irc ire iri irn irp irr n-i ncc nce nci ncn ncp ncr ne- nec nee nei nen nep ner nic nie nii nin nip nir nnc nne nni nnn nnp npc npe npi npn npp npr nrc nre nri nrn nrp nrr p-p pcc pce pci pcn pcp pcr pec pee pei pen pep per pic pie pii pin pip pir pn- pnc pne pni pnn pnp pnr ppc ppe ppi ppn ppp ppr prc pre pri prn prp prr rcc rce rci rcn rcp rcr re- rec ree rei ren rep rer ric rie rii rin rip rir rnc rni rnn rnp rnr rpc rpe rpi rpn rpp rpr rrc rri rrn rrp rrr