2 delete - delete an element from a list at a specified position
9 index nonnegative integer less than the size of the list
11 return type of the deleted element
14 Deletes element at the specified index from list lst, and returns
15 the value of this element.
20 list (4 elements, 4 nonzero):
30 list (3 elements, 3 nonzero):
42 append, insert, pop, push, remove, size