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.

Example Input: [-21, 11, 84, -2, 26, 64, 54, -49, 28]
Example Output: 2

Example Input: [71, -39, -69, 71]
Example Output: 0

Example Input: [-82, 15, 67, -52]
Example Output:
30