A contrived structure with asyndeton is that in which an asyndetic pair is followed by another pair, asyndetic or syndetic, the members of which refer back to the members of the first pair. Usually the first member of the initial asyndetic pair is picked up by the first member of the following pair (and the second member by the second), but there is sometimes chiasmus, such that the second two terms allude to the first two in reverse order.