οὓς ἡγεμόνας πόλεως ἐπαιδεύσασθε → whom you educated as city leaders
ἀλήλεκα: ἀλήλεμαι ἢ -εσμαι, ἴδε ἐν λ. ἀλέω = ἀλήθω.
v. ἀλέω.