-er -ic c-- ccc cce cci ccl ccp ccr ce- cec cee cei cel cep cer ci- cic cie cii cil cip cir cl- clc cle cli cll clp clr cpc cpe cpi cpl cpp cpr crc cre cri crl crp crr ec- ecc ece eci ecl ecr eec eee eel eep eer eic eie eii eil eip eir elc ele eli ell elp elr ep- epc epe epi epl epp epr erc ere eri erl erp err icc ice ici icl icp icr ie- iec iee iei iel iep ier iic iie iii iil iip iir il- ilc ile ili ill ilp ilr ipc ipe ipi ipl ipp ipr ir- irc ire iri irl irp irr l-p lcc lce lci lcl lcp lcr lec lee lei lel lep ler lic lie lii lil lip lir llc lle lli lll llp llr lpc lpe lpi lpl lpp lpr lrc lri lrp lrr p-p pcc pce pci pcl pcp pcr pec pee pei pel pep per pic pie pii pil pip pir plc ple pli pll plp plr ppc ppe ppi ppl ppp ppr prc pre pri prl prp prr rcc rce rci rcl rcp rcr re- rec ree rei rel rep rer ric rie rii ril rip rir rlc rle rli rll rlp rlr rpc rpe rpi rpl rpp rpr rrc rri rrl rrp rrr