def minimumNumber(n:int, password:str):
    conditions = {"numbers":0,"lower_case":0,"upper_case":0,"special_characters":0}
    for letter in range(n):
        if password[letter].isdigit():
            conditions["numbers"] +=1
        elif password[letter].islower():
            conditions["lower_case"] +=1
        elif password[letter].isupper():
            conditions["upper_case"] +=1
        elif password[letter].isalnum() == False:
            conditions["special_characters"] +=1
    missing_types = len([v for v in conditions.values() if v == 0])
    return max(missing_types, 6 - n)