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.

[43, 34, 44, -40, -37, -38, -21, 86, -13]
1

[-93, -27, -10, -36, 18]
9

[14, 89, -54, 21]

7