-er c-- ccc cce ccn ccp ccr ccz ce- cec cee cen cep cer cez cn- cnc cne cnn cnp cnr cpc cpe cpn cpp cpr cpz crc cre crn crp crr crz cz- czc cze ec- ecc ece ecn ecr eec eee een eep eer en- enc ene enn enp enr enz ep- epc epe epn epp epr epz erc ere ern erp err erz eze ezr ezz ncc nce ncn ncp ncr ne- nec nee nen nep ner nez nnc nne nnn nnp nnz npc npe npn npp npr npz nrc nre nrn nrp nrr nrz nze nzp nzz p-p pcc pce pcn pcp pcr pec pee pen pep per pez pn- pnc pne pnn pnp pnr ppc ppe ppn ppp ppr ppz prc pre prn prp prr prz pzc pzp rcc rce rcn rcp rcr re- rec ree ren rep rer rez rnc rnn rnp rnr rnz rpc rpe rpn rpp rpr rpz rrc rrn rrp rrr rze zce zec zee zen zep zer zez znc zne znn znp zpc zpe zpp zpr zrp zzr zzz