Array
(
    [0] => 1
    [1] => 2
    [2] => 3
)
Array
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
)
Removing...
Array
(
    [0] => 1
    [2] => 3
    [3] => 4
)
ELEM: 1
ELEM:
ELEM: 3