-er c-- ccc cce ccf ccn cco ccp ccr ce- cec cee cef cen ceo cep cer cfc cfe cff cfn cfo cfp cfr cn- cnc cne cnf cnn cno cnp cnr co- coc coe cof con coo cop cor cpc cpe cpf cpn cpo cpp cpr crc cre crf crn cro crp crr ec- ecc ece ecf ecn eco ecr eec eee eef een eeo eep eer ef- efc efe eff efo efp efr en- enc ene enf enn eno enp enr eo- eoc eoe eof eon eoo eop eor ep- epc epe epf epn epo epp epr erc ere erf ern ero erp err fcc fce fcf fcn fco fcp fcr fec fee fef fen feo fep fer ffc ffe fff ffn ffo ffp ffr fnc fne fnf fnn fnp fnr foc foe fof fon foo fop for fpc fpe fpn fpo fpp fpr frc fre frf frn fro frp frr ncc nce ncf ncn nco ncp ncr ne- nec nee nef nen neo nep ner nfc nfe nff nfn nfo nfp nfr nnc nne nnf nnn nno nnp no- noc noe nof non noo nop nor npc npe npf npn npo npp npr nrc nre nrf nrn nro nrp nrr oc- occ ocf ocn oco ocp ocr oec oee oef oen oeo oep oer of- ofc ofe off ofn ofo ofp ofr on- onc one onf onn ono onp onr oo- ooc oof oon ooo oop oor op- opc ope opf opn opo opp opr or- orc ore orf orn oro orp orr p-p pcc pce pcf pcn pco pcp pcr pec pee pef pen peo pep per pfc pfe pff pfn pfo pfp pfr pn- pnc pne pnf pnn pno pnp pnr poc poe pof pon poo pop por ppc ppe ppf ppn ppo ppp ppr prc pre prf prn pro prp prr rcc rce rcf rcn rco rcp rcr re- rec ree ref ren reo rep rer rfc rfe rff rfn rfo rfp rfr rnc rnn rno rnp rnr roc roe rof ron roo rop ror rpc rpe rpf rpn rpo rpp rpr rrc rrf rrn rrp rrr