What does each delete $()$ call return within the following sequence of operations?

insert $(5,$ A$)$

insert $(4,$ B$)$

insert $(7,$ F$)$

insert $(1,$ D$)$

delete$()$

insert $(3,$ J$)$

insert $(6,L)$

delete$()$

build a Min Heap, and give the root element, after deletion, in the given sequence

$**$ priority$-$ordering is given by the integer