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.

[Q]: [-21, 11, 84, -2, 26, 64, 54, -49, 28]
[A]: 2


[Q]: [100, -87, -95, -56]
[A]: 8


[Q]: [40, 21, -50, -68]
[A]:
18