-er -ic c-- ccc cce cci ccm cco ccr ce- cec cee cei cem ceo cer ci- cic cie cii cim cio cir cmc cme cmi cmm cmo cmr co- coc coe coi com coo cor crc cre cri crm cro crr ec- ecc ece eci ecm eco ecr eec eee eem eeo eer eic eie eii eim eio eir em- emc eme emi emm emo emr eo- eoc eoe eoi eom eoo eor erc ere eri erm ero err icc ice ici icm ico icr ie- iec iee iei iem ier iic iie iii iim iio iir im- imc ime imi imm imo io- ioc ioe ioi iom ioo ior ir- irc ire iri irm iro irr m-o m-r mc- mcc mce mci mcm mco mcr mec mee mei mem meo mer mi- mic mie mii mim mio mir mmc mme mmi mmm mmo mmr moc moe moi mom moo mor mrc mre mri mrm mro mrr o-i oc- occ oci ocm oco ocr oec oee oei oem oeo oer oic oie oii oim oio oir om- omc ome omi omm omo omr oo- ooc ooi oom ooo oor or- orc ore ori orm oro orr rcc rce rci rcm rco rcr re- rec ree rei rem reo rer ric rie rii rim rio rir rmc rme rmi rmm rmo rmr roc roe roi rom roo ror rrc rri rrm rrr