-er c-- ccc cce ccn cco ccp ccr ccz ce- cec cee cen ceo cep cer cez cn- cnc cne cnn cno cnp cnr co- coc coe con coo cop cor coz cpc cpe cpn cpo cpp cpr cpz crc cre crn cro crp crr crz cz- czc cze czo ec- ecc ece ecn eco ecr eec eee een eeo eep eer en- enc ene enn eno enp enr enz eo- eoc eoe eon eoo eop eor ep- epc epe epn epo epp epr epz erc ere ern ero erp err erz eze ezo ezr ezz ncc nce ncn nco ncp ncr ne- nec nee nen neo nep ner nez nnc nne nnn nno nnp nnz no- noc noe non noo nop nor noz npc npe npn npo npp npr npz nrc nre nrn nro nrp nrr nrz nze nzo nzp nzz oc- occ ocn oco ocp ocr ocz oec oee oen oeo oep oer on- onc one onn ono onp onr oo- ooc oon ooo oop oor op- opc ope opn opo opp opr or- orc ore orn oro orp orr orz oze ozo ozz p-p pcc pce pcn pco pcp pcr pec pee pen peo pep per pez pn- pnc pne pnn pno pnp pnr poc poe pon poo pop por poz ppc ppe ppn ppo ppp ppr ppz prc pre prn pro prp prr prz pzc pzp rcc rce rcn rco rcp rcr re- rec ree ren reo rep rer rez rnc rnn rno rnp rnr rnz roc roe ron roo rop ror roz rpc rpe rpn rpo rpp rpr rpz rrc rrn rrp rrr rze rzo zce zco zec zee zen zeo zep zer zez znc zne znn zno znp zo- zoc zoe zon zoo zor zpc zpe zpo zpp zpr zro zrp zzr zzz