# Make it explode!

Take a matrix of positive integers as input, and make it explode!

The way you explode a matrix is by simply adding zeros around every element, including the outside borders.

Input/output formats are optional as always!

### Test cases:

1
-----
0 0 0
0 1 0
0 0 0
--------------

1 4
5 2
-----
0 0 0 0 0
0 1 0 4 0
0 0 0 0 0
0 5 0 2 0
0 0 0 0 0
--------------

1 4 7
-----
0 0 0 0 0 0 0
0 1 0 4 0 7 0
0 0 0 0 0 0 0
--------------

6
4
2
-----
0 0 0
0 6 0
0 0 0
0 4 0
0 0 0
0 2 0
0 0 0


def n(a):