-er c-- ccc cce ccf ccm ccn cco ccp ccr ce- cec cee cef cem cen ceo cep cer cfc cfe cff cfm cfn cfo cfp cfr cmc cme cmf cmm cmn cmo cmp cmr cn- cnc cne cnf cnm cnn cno cnp cnr co- coc coe cof com con coo cop cor cpc cpe cpf cpm cpn cpo cpp cpr crc cre crf crm crn cro crp crr ec- ecc ece ecf ecm ecn eco ecr eec eee eef eem een eeo eep eer ef- efc efe eff efm efo efp efr em- emc eme emf emm emn emo emp emr en- enc ene enf enm enn eno enp enr eo- eoc eoe eof eom eon eoo eop eor ep- epc epe epf epm epn epo epp epr erc ere erf erm ern ero erp err fcc fce fcf fcm fcn fco fcp fcr fec fee fef fem fen feo fep fer ffc ffe fff ffm ffn ffo ffp ffr fmc fme fmf fmm fmn fmo fmp fmr fnc fne fnf fnm fnn fnp fnr foc foe fof fom fon foo fop for fpc fpe fpm fpn fpo fpp fpr frc fre frf frm frn fro frp frr m-f m-o m-r mc- mcc mce mcf mcm mcn mco mcp mcr mec mee mef mem men meo mep mer mfc mfe mff mfm mfn mfo mfp mfr mmc mme mmf mmm mmn mmo mmp mmr mnc mne mnf mnm mnn mno mnp mnr moc moe mof mom mon moo mop mor mpc mpe mpf mpm mpn mpo mpp mpr mrc mre mrf mrm mrn mro mrp mrr ncc nce ncf ncm ncn nco ncp ncr ne- nec nee nef nem nen neo nep ner nfc nfe nff nfn nfo nfp nfr nmc nme nmm nmn nmo nmp nmr nnc nne nnf nnm nnn nno nnp no- noc noe nof nom non noo nop nor npc npe npf npm npn npo npp npr nrc nre nrf nrm nrn nro nrp nrr oc- occ ocf ocm ocn oco ocp ocr oec oee oef oem oen oeo oep oer of- ofc ofe off ofm ofn ofo ofp ofr om- omc ome omf omm omn omo omp omr on- onc one onf onn ono onp onr oo- ooc oof oom oon ooo oop oor op- opc ope opf opm opn opo opp opr or- orc ore orf orm orn oro orp orr p-p pcc pce pcf pcm pcn pco pcp pcr pec pee pef pem pen peo pep per pfc pfe pff pfm pfn pfo pfp pfr pmc pme pmf pmm pmn pmo pmp pmr pn- pnc pne pnf pnm pnn pno pnp pnr poc poe pof pom pon poo pop por ppc ppe ppf ppm ppn ppo ppp ppr prc pre prf prm prn pro prp prr rcc rce rcf rcm rcn rco rcp rcr re- rec ree ref rem ren reo rep rer rfc rfe rff rfm rfn rfo rfp rfr rmc rme rmf rmm rmn rmo rmp rmr rnc rnm rnn rno rnp rnr roc roe rof rom ron roo rop ror rpc rpe rpf rpm rpn rpo rpp rpr rrc rrf rrm rrn rrp rrr