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τριῶν

m./f./n. Gen Pl of τρεῖς, τρεῖς, τρία (adj.) ‘three’

τρεῖς

m./f. Nom/Acc Pl of τρεῖς, τρεῖς, τρία (num.) ‘three’

εἰς

(prep. + Acc) ’toward, into’ [also ἐς, which is also prev.] sometimes a misprint of m. Nom Sg of εἷς (num.) ’one’