-er -ic c-- ccc cce cci ccp ccr ccz ce- cec cee cei cep cer cez ci- cic cie cii cip cir cpc cpe cpi cpp cpr cpz crc cre cri crp crr crz cz- czc cze ec- ecc ece eci ecr eec eee eep eer eic eie eii eip eir ep- epc epe epi epp epr epz erc ere eri erp err erz eze ezr ezz icc ice ici icp icr icz ie- iec iee iei iep ier iic iie iii iip iir ipc ipe ipi ipp ipr ir- irc ire iri irp irr ize izi izz p-p pcc pce pci pcp pcr pec pee pei pep per pez pic pie pii pip pir piz ppc ppe ppi ppp ppr ppz prc pre pri prp prr prz pzc pzp rcc rce rci rcp rcr re- rec ree rei rep rer rez ric rie rii rip rir riz rpc rpe rpi rpp rpr rpz rrc rri rrp rrr rze zce zec zee zep zer zez zie zip zir ziz zpc zpe zpi zpp zpr zrp zzr zzz