In this task you will be given a list of integers. You should find the minimum absolute difference between 2 integers in the list. The absolute difference is the absolute value of one integer subtracted by another. The output should be a single integer which is the smallest possible absolute distance.

Ex Input:
[-16, 15, -28]

Ex Output:
12


Ex Input:
[19, 68, 23, -21, -57, -33]

Ex Output:
4


Ex Input:
[-18, -70, 70, 91]

Ex Output:

21