-er c-- ccc cce ccl ccn ccp ccr ce- cec cee cel cen cep cer cl- clc cle cll cln clp clr cn- cnc cne cnl cnn cnp cnr cpc cpe cpl cpn cpp cpr crc cre crl crn crp crr ec- ecc ece ecl ecn ecr eec eee eel een eep eer elc ele ell eln elp elr en- enc ene enl enn enp enr ep- epc epe epl epn epp epr erc ere erl ern erp err l-p lcc lce lcl lcn lcp lcr lec lee lel len lep ler llc lle lll lln llp llr lnc lne lnl lnn lnp lnr lpc lpe lpl lpn lpp lpr lrc lrn lrp lrr ncc nce ncl ncn ncp ncr ne- nec nee nel nen nep ner nlc nle nll nln nlp nlr nnc nne nnl nnn nnp npc npe npl npn npp npr nrc nre nrl nrn nrp nrr p-p pcc pce pcl pcn pcp pcr pec pee pel pen pep per plc ple pll pln plp plr pn- pnc pne pnl pnn pnp pnr ppc ppe ppl ppn ppp ppr prc pre prl prn prp prr rcc rce rcl rcn rcp rcr re- rec ree rel ren rep rer rlc rle rll rln rlp rlr rnc rnn rnp rnr rpc rpe rpl rpn rpp rpr rrc rrl rrn rrp rrr