What elements are contained in the set after this code executes?

Set set = new HashSet();

set.add(74); set.add(12); set.add(74); set.add(74); set.add(43); set.remove(74); set.remove(999); set.remove(43); set.add(12); set.add(32); set.add(9); set.add(999);

type Your response as a [set]