from collections import defaultdict


class Solution:
    def minimumAbsDifference(self, arr: List[int]) -> List[List[int]]:
        arr.sort()
        d = defaultdict(list)
        for i in range(len(arr) - 1):
            d[arr[i + 1] - arr[i]].append((arr[i], arr[i + 1]))
        return d[min(d.keys())]
