whoever
From LSJ
κάλλιστον ἐφόδιον τῷ γήρᾳ ἡ παιδεία (Aristotle, quoted by Diogenes Laertius 5.21) → the finest provision for old age is education
P. and V. ὅστις, ὃς ἄν (with subj.), ὅστις ἄν (with subj.), Ar. and P. ὁστισοῦν, ὅστις περ, P. ὁστισδήποτε, ὁστισδηποτοῦν.