-er -ic c-- ccc cce cci ccm cco ccp ccr ce- cec cee cei cem ceo cep cer ci- cic cie cii cim cio cip cir cmc cme cmi cmm cmo cmp cmr co- coc coe coi com coo cop cor cpc cpe cpi cpm cpo cpp cpr crc cre cri crm cro crp crr ec- ecc ece eci ecm eco ecr eec eee eem eeo eep eer eic eie eii eim eio eip eir em- emc eme emi emm emo emp emr eo- eoc eoe eoi eom eoo eop eor ep- epc epe epi epm epo epp epr erc ere eri erm ero erp err icc ice ici icm ico icp icr ie- iec iee iei iem iep ier iic iie iii iim iio iip iir im- imc ime imi imm imo imp io- ioc ioe ioi iom ioo iop ior ipc ipe ipi ipm ipo ipp ipr ir- irc ire iri irm iro irp irr m-o m-r mc- mcc mce mci mcm mco mcp mcr mec mee mei mem meo mep mer mi- mic mie mii mim mio mip mir mmc mme mmi mmm mmo mmp mmr moc moe moi mom moo mop mor mpc mpe mpi mpm mpo mpp mpr mrc mre mri mrm mro mrp mrr o-i oc- occ oci ocm oco ocp ocr oec oee oei oem oeo oep oer oic oie oii oim oio oip oir om- omc ome omi omm omo omp omr oo- ooc ooi oom ooo oop oor op- opc ope opi opm opo opp opr or- orc ore ori orm oro orp orr p-p pcc pce pci pcm pco pcp pcr pec pee pei pem peo pep per pic pie pii pim pio pip pir pmc pme pmi pmm pmo pmp pmr poc poe poi pom poo pop por ppc ppe ppi ppm ppo ppp ppr prc pre pri prm pro prp prr rcc rce rci rcm rco rcp rcr re- rec ree rei rem reo rep rer ric rie rii rim rio rip rir rmc rme rmi rmm rmo rmp rmr roc roe roi rom roo rop ror rpc rpe rpi rpm rpo rpp rpr rrc rri rrm rrp rrr