-er c-- ccc cce ccm ccn cco ccp ccr ce- cec cee cem cen ceo cep cer cmc cme cmm cmn cmo cmp cmr cn- cnc cne cnm cnn cno cnp cnr co- coc coe com con coo cop cor cpc cpe cpm cpn cpo cpp cpr crc cre crm crn cro crp crr ec- ecc ece ecm ecn eco ecr eec eee eem een eeo eep eer em- emc eme emm emn emo emp emr en- enc ene enm enn eno enp enr eo- eoc eoe eom eon eoo eop eor ep- epc epe epm epn epo epp epr erc ere erm ern ero erp err m-o m-r mc- mcc mce mcm mcn mco mcp mcr mec mee mem men meo mep mer mmc mme mmm mmn mmo mmp mmr mnc mne mnm mnn mno mnp mnr moc moe mom mon moo mop mor mpc mpe mpm mpn mpo mpp mpr mrc mre mrm mrn mro mrp mrr ncc nce ncm ncn nco ncp ncr ne- nec nee nem nen neo nep ner nmc nme nmm nmn nmo nmp nmr nnc nne nnm nnn nno nnp no- noc noe nom non noo nop nor npc npe npm npn npo npp npr nrc nre nrm nrn nro nrp nrr oc- occ ocm ocn oco ocp ocr oec oee oem oen oeo oep oer om- omc ome omm omn omo omp omr on- onc one onn ono onp onr oo- ooc oom oon ooo oop oor op- opc ope opm opn opo opp opr or- orc ore orm orn oro orp orr p-p pcc pce pcm pcn pco pcp pcr pec pee pem pen peo pep per pmc pme pmm pmn pmo pmp pmr pn- pnc pne pnm pnn pno pnp pnr poc poe pom pon poo pop por ppc ppe ppm ppn ppo ppp ppr prc pre prm prn pro prp prr rcc rce rcm rcn rco rcp rcr re- rec ree rem ren reo rep rer rmc rme rmm rmn rmo rmp rmr rnc rnm rnn rno rnp rnr roc roe rom ron roo rop ror rpc rpe rpm rpn rpo rpp rpr rrc rrm rrn rrp rrr