public static List<Integer> missingNumbers(List<Integer> arr, List<Integer> brr) {
        // Write your code here
        List<Integer> result = new ArrayList<>();

        Map<Integer, Integer> freqArr = new HashMap<>();
        Map<Integer, Integer> freqBrr = new HashMap<>();

        for (int num : arr) {
            freqArr.put(num, freqArr.getOrDefault(num, 0) + 1);
        }

        for (int num : brr) {
            freqBrr.put(num, freqBrr.getOrDefault(num, 0) + 1);
        }

        for (Map.Entry<Integer, Integer> entry : freqBrr.entrySet()) {
            int num = entry.getKey();
            int freqInBrr = entry.getValue();
            int freqInArr = freqArr.getOrDefault(num, 0);

            if (freqInBrr > freqInArr) {
                result.add(num);
            }
        }

        Collections.sort(result);

        return result;
    }