After suit agreement, the bid of 4NT showed two aces and the king of a (genuine) bid suit, or three aces.
ˈæftɚ sˈuːt ɐɡɹˈiːmənt, ðə bˈɪd ʌv fˈoːɹ ˌɛntˈiː ʃˈoʊd tˈuː ˈeɪsᵻz ænd ðə kˈɪŋ əvə dʒˈɛnjuːɪn bˈɪd sˈuːt, ɔːɹ θɹˈiː ˈeɪsᵻz.