def missingNumbers(arr:list, brr:list):
    sol = []
    
    arr_frequency = Frequency(arr)
    brr_frequency = Frequency(brr)

    for number , freq in brr_frequency.items():
        if number not in arr_frequency:
            sol.append(number)
        elif number in arr_frequency:
            if arr_frequency[number] != freq: 
                sol.append(number)
    return sorted(sol)

def Frequency(elements:list):
    temp = {}
    for element in elements:
        if element not in temp:
            temp[element] = 1
        else:
            temp[element] += 1
    return temp