Ed, > ERRWSQE EN IHSOU XRISTOU hUPOTASSOMENOI TW EPISKOPW hWS TH ENTOLH > hOMOIWS KAI TW PRESBUTERIW > > KAI hOI KAT' ANDRA ALLHLOUS AGAPATE EN AMERISTW KARDIA. > hOI KAT' ANDRA is a locution for 'each of you'. The hOI nominalizes the adverbial (prepositional) phrase KAT' ANDRA, 'individually'. See BDAG ANHR 2. Mark DelCogliano